middle seasons

. The doctor gives you 3 pills, you have 1 every 30 minutes, how long will these pills be finished? Correct answer b a.30 minutes b.60 minutes c.90 minutes Question 2. On the bus, two people are talking enthusiastically, but the people next to them can't hear a word, why? Correct answer C A. Because they're talking on their cell phones. B. Maybe the people next to them have blocked their ears. C. They're using a bookkeeper. Question 3. There is a word, everyone will read the wrong, what

them in the following form: SELECT department_id, to_number (null) location , hire_date from Employees UNION SELECT department_id, location_id, to_date (null) from departments; SELECT employee_id, Job_id,salary from Employees UNION SELECT employee_id, job_id,0from job_history; third, intersection--intersect 　　 SELECT * from employees1 INTERSECT SELECT * from Employees2 Four, the difference set--minus 　　 SELECT employee_id,job_id from Employees minus SELECT

I. Using a FOR loop cursor:1. Define a cursor (a cursor is a small collection)2. Defining cursor Variables3. Using a For loop cursorDeclare --Define cursor c_job cursor c_job is select Empno, ename, Job, Sal from emp where job = ' MANAGER '; ---Define cursor variable c_row c_row c_job%rowtype;begin -loop cursor, c_row the value of the loop with the cursor variable for c_row in C_job loop Dbms_ Output.put_line (C_row.empno | | '-' || C_row.ename | | '-' ||

, Employee table is child table):Create a supermarket table and display the table structure (parent table): Create an employee table and display the table structure (child table):Set the foreign key part of the SQL statement:Five Design of a one-to-many relational table and design of many-to-many relational tables1. Associate the parent table's primary key by setting a foreign key on the table so that a record of the parent table can correlate multiple records of the child table.% is no longer a

= Person.mt.id.3 #分表设置, in this case the person is the library name, MT is the table name, the ID is a sub-table field, 3 is the number of children, you can set multiple items, separated by commasPWDs = user1:+jksgb3yag8=, user2:gs+tr4tpgqc= #用户名与其对应的加密过的密码, the password is encrypted using an encryption program encrypt, which is used for multiple user names to access the same instance of Atlas simultaneously. If you have only one user name, you do not need to set thischarset = UTF8 #默认字符集, if t

Samba MS-SAMR/MS-LSAD man-in-the-middle attack Vulnerability (CVE-2016-2118)Samba MS-SAMR/MS-LSAD man-in-the-middle attack Vulnerability (CVE-2016-2118) Release date:Updated on:Affected Systems: Samba Samba 3.6.0 － 4.4.0 Description: CVE (CAN) ID: CVE-2016-2118Samba is a free software that implements the SMB protocol on Linux and UNIX systems. It consists of servers and client programs.Samba 3.6.0-4.4.0 do

For binary tree, there are pre-order, middle order and three kinds of traversal methods. Since the definition of a tree is itself a recursive definition, the recursive approach to implementing the tree's three traversal is not only easy to understand but also very concise. For the traversal of the tree, it is necessary to use the stack to simulate the implementation of the non-recursive method. In three kinds of traversal, the non-recursive algorithm

PHP allows you to share user-defined functions hidden by asterisks (*) with four digits in the middle of a mobile phone number. Php shields four phone numbers in the middle: Copy codeThe Code is as follows:Method 1:Function hidtel ($ phone ){$ IsWhat = preg_match ('/(0 [0-9] {2, 3} [\-]? [2-9] [0-9] {6, 7} [\-]? [0-9]?) /I ', $ phone); // fixed phone numberIf ($ IsWhat = 1 ){Return preg_replace ('/(0 [0-9]

This article mainly introduces the PHP mobile phone number middle four with asterisks * instead of display examples, with a certain reference value, interested in small partners can refer to In the display user list of the scene, the general use of mobile phone number of the display need to handle the mobile phone number, the general is the middle of the four-bit into the asterisk * * * * * * * * * * *, I

Find a list of the middle node position there are many ways, first of all think of traversing through the number of nodes, and then take half as the counter control access steps.Another regular use is to set two pointers: Fast_p, slow_p, steps 2 and 1, respectively, according to the physical distance formulas = v * t;Fast_p through the distance is twice times slow_p, fast_p go to the tail of the list, slow_p must be in the

Given Preorder and inorder traversal of a tree, construct the binary tree.Note:Assume that duplicates does not exist in the tree.Idea: First, according to the pre-order traversal to get the root node, and then in the middle sequence traversal to get the root node position, the left is the left dial hand tree, the right is the right sub-tree.Then, the structure of the right subtree of Saozi can be solved recursively. The code is as follows:/** * Defini

#pragma mark captures a picture of the middle rectangular area of a picture based on size the size here is square-(UIImage *) Cutcenterimage: (UIImage *) image size: (cgsize) size{cgsize imag Esize = image.size; CGRect rect; Calculates the position and size of the middle rectangular area of the picture according to the size of the image if (ImageSize.Width > Imagesize.height) {float LeftMargin = (imag

Code:- (void) viewdidload{[Super Viewdidload]; //Do any additional setup after loading the view.Uiimageview*imageview=[[uiimageview Alloc]initwithframe:cgrectmake ( -, -, $, $)]; Imageview.backgroundcolor=[Uicolor Redcolor]; //show the captured graphImageview.image=[self cutcenterimage:[uiimage imagenamed:@"1.jpg"] Size:cgsizemake ( $, $)]; [Self.view Addsubview:imageview]; }#pragmaMark captures a picture of the middle rectangular area of a pic

To enter the results of the pre-order traversal and the middle sequence traversal of a binary tree, rebuild the two-fork tree. If the input of the pre-order traversal and the result of the middle-order traversal does not contain repeated numbers. For example, enter the pre-sequence traversal sequence {1,2,4,7,3,5,6,8} and the middle sequence traversal sequence {4

Program function: Write program in the middle of the screen display "a" ~ "Z", and can let people see, this task is better to achieve.(1) in b800:[160*12+40*2] Place the ASCII code of A, (2) in the loop using a 100000000000H cycle idling to achieve the delay effect, (3) press the keyboard to raise the INT9 interrupt color changeSo how to implement, press the ESC key, change the color of the display?When the keyboard input reaches the 60h port, a 9th i

How can I replace a character in the middle of a string? how can I replace a character in the middle of a string? For example, replace nbsp; fdsfdsfdsjkww with: f ************ w for example: nbsp; replace points with: deduct *** for example: nbsp; replace the deduction points with *** s. For example, nbsp; tt: replace the deduction points: t ***** s how to replace the character in the

Memories of the middle school age-Teachers' blackboard Jack Zhai Old students have occasional gatherings, classmates, teachers, friends, and parents... There is always an endless past. In the ignorant youth era, the ever-changing world makes us lament whether we are more and less sincere and happy in childhood. In fact, the most memorable part is the school and classroom. It is where we live and grow together. It is also where we learn knowledge and

1. First Order traversal: the right subtree, left dial hand tree, root node1 # Sequential Print binary tree (recursive) 2 def preordertraverse (node): 3 if is None: 4 return None 5 Print (Node.val) 6 preordertraverse (node.left)7 preordertraverse (node.right)1 #Sequential Print binary tree (non-recursive)2 defPreordertravese (node):3stack =[node]4 whileLen (Stack) >0:5 Print(Node.val)6 ifNode.right is notNone:7 stack.append (node.right)8 ifN

It is known that the sequence traversal results and the sequence traversal results of a binary tree are not duplicated in the sequence traversal and the middle sequence traversal results. For example, the sequence of the forward traversal of a binary tree is {1,2,4,7,3,5,6,8} in sequence traversal sequence {4,7,2,1,5,3,8,6}.Reconstruction of binary tree by forward-sequence traversal and middle-order travers

To block the middle segment of the phone number, first know the regular expression of the phone number.First look at the regular expression of the PHP match phone number.Regular expressions that match a fixed phone are:/(0[0-9]{2,3}[\-]? [2-9] [0-9] {6,7} [\-]? [0-9]?) /IThe regular expression that matches the phone number is:/(1[358]{1}[0-9]{9})/ITo match all the phone numbers with an expression, you just need to merge them together, as follows:/(0[0