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【单选题】
编制一个好的程序，首先要保证它的正确性和可靠性，还应强调良好的编程风格，在选择标识的名字考虑
A.
名字长度越短越好，以减少程序的输入量
B.
多个变量共用一个名字，以减少变量名的数目
C.
选择含义明确的名字，以正确提示所代表的实体
D.
尽量用关键字作名字，以使名字标准化
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举一反三
【单选题】What is the main point of the report?
A.
Obama days Mandela is not only his personal hero but also a hero for the world.
B.
Obama is going to meet with the Mandela family instead of Nelson Mandela.
C.
President Obama may not get a chance to see Nelson Mandela on his trip to South Africa.
D.
The trip is bittersweet because President Obama cannot pay tribute to the man he calls a hero to the world.
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【多选题】修改工具栏用窗口选择对象时,从右下角和左下角窗口拉选有什么特点?
A.
右下角只能选择全部框进去的
B.
左上角只能选择全部框进去的
C.
左上角只要相交就能选择住
D.
右下角只要和框相交就能选择住
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【单选题】某一元弱酸的浓度为 0.01mol·L -1 , 298K 时离解度为 1% ,该一元弱酸的 K a 是:
A.
10 -2
B.
10 -4
C.
10 -6
D.
10 -8
E.
10 -10
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【单选题】以下哪一个工作不属于外贸单证员的工作任务( )
A.
跟单
B.
报检
C.
报关
D.
投保
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【简答题】天花粉的功效有___、___。
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【单选题】已知0.01 mol/L某一元弱酸的pH = 5.0，则该弱酸的Ka为：
A.
5%
B.
10 -3
C.
10 -8
D.
10 -7
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【单选题】He added, 'President Obama is going to do_____ he thinks is necessary to get our economy moving a
A.
30．He added, 'President Obama is going to do_____ he thinks is necessary to get our economy moving again.' A．everything what
B.
no matter what
C.
whichever
D.
whatever
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【单选题】某一元弱酸的浓度为0.01mol·L-1,298K时离解度为1%,该一元弱酸的Kθa
A.
10-2
B.
10-4
C.
10-8
D.
10-6
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【单选题】What did Obama say toward progress in peace talks between Israelis and Palestinians?
A.
He says Israelis is going to have to make some difficult compromises.
B.
He said the atmosphere in which talks can restart cannot be created.
C.
He said they should work together to stop extremism and support peace.
D.
All of the above are right.
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【单选题】已知某一元弱酸的 ,则该一元弱酸与其共轭碱组成的缓冲溶液的缓冲范围是 ( )
A.
pH < 5.0
B.
5.0 < pH < 7.0
C.
4.0 < pH < 6.0
D.
pH > 7.0
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相关题目：
【单选题】What is the main point of the report?
A.
Obama days Mandela is not only his personal hero but also a hero for the world.
B.
Obama is going to meet with the Mandela family instead of Nelson Mandela.
C.
President Obama may not get a chance to see Nelson Mandela on his trip to South Africa.
D.
The trip is bittersweet because President Obama cannot pay tribute to the man he calls a hero to the world.
查看完整题目与答案
【多选题】修改工具栏用窗口选择对象时,从右下角和左下角窗口拉选有什么特点?
A.
右下角只能选择全部框进去的
B.
左上角只能选择全部框进去的
C.
左上角只要相交就能选择住
D.
右下角只要和框相交就能选择住
查看完整题目与答案
【单选题】某一元弱酸的浓度为 0.01mol·L -1 , 298K 时离解度为 1% ,该一元弱酸的 K a 是:
A.
10 -2
B.
10 -4
C.
10 -6
D.
10 -8
E.
10 -10
查看完整题目与答案
【单选题】以下哪一个工作不属于外贸单证员的工作任务( )
A.
跟单
B.
报检
C.
报关
D.
投保
查看完整题目与答案
【简答题】天花粉的功效有___、___。
查看完整题目与答案
【单选题】已知0.01 mol/L某一元弱酸的pH = 5.0，则该弱酸的Ka为：
A.
5%
B.
10 -3
C.
10 -8
D.
10 -7
查看完整题目与答案
【单选题】He added, 'President Obama is going to do_____ he thinks is necessary to get our economy moving a
A.
30．He added, 'President Obama is going to do_____ he thinks is necessary to get our economy moving again.' A．everything what
B.
no matter what
C.
whichever
D.
whatever
查看完整题目与答案
【单选题】某一元弱酸的浓度为0.01mol·L-1,298K时离解度为1%,该一元弱酸的Kθa
A.
10-2
B.
10-4
C.
10-8
D.
10-6
查看完整题目与答案
【单选题】What did Obama say toward progress in peace talks between Israelis and Palestinians?
A.
He says Israelis is going to have to make some difficult compromises.
B.
He said the atmosphere in which talks can restart cannot be created.
C.
He said they should work together to stop extremism and support peace.
D.
All of the above are right.
查看完整题目与答案
【单选题】已知某一元弱酸的 ,则该一元弱酸与其共轭碱组成的缓冲溶液的缓冲范围是 ( )
A.
pH < 5.0
B.
5.0 < pH < 7.0
C.
4.0 < pH < 6.0
D.
pH > 7.0
查看完整题目与答案