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【多选题】
楼梯踏步的计算公式常为( )A.
h+b=450mm
B.
h+b=600mm
C.
2h+b=600-620mm
D.
2h-b=600-620mm
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【单选题】关于计算机语言，下列叙述正确的是（）。
A.
高级语言是与计算机型号无关的计算机语言
B.
低级语言学习使用很难，运行效率也低，所以已被高级语言淘汰
C.
汇编语言程序是最早出现的高级语言
D.
计算机能够直接理解、执行汇编语言程序
【简答题】Why don’t your parents let you drink dirty water?
【简答题】Why did the parents mentioned in the third paragraph leave the child alone in a room?
【单选题】Why are parents feeling more comfortable now?
A.
Technology keeps parents informed of their children.
B.
Websites give children information about their parents.
C.
Computer programmes help children do different activities.
D.
Parents' phones are now updated with children's pictures.
【简答题】A．Why his parents wanted to go to Gettysburg. B．Why his family's vacation plans changed ten years ago. C．Where his family went for a vacation ten years ago. D．When his family went on their last vacati...
【简答题】Why did the parents mentioned in the fourth paragraph leave the child alone in a room?
【单选题】Why do the parents choose private school for their children?
A.
The parents choose private school mainly because they give religious instructions that can’t be done in public schools.
B.
The parents choose private school mainly because the tuition there is very low
C.
The parents choose private school mainly because they are located near their houses.
D.
The parents choose private school mainly because they are safer and have higher academic standards than public schools.
【单选题】关于计算机语言,下列叙述正确的是________。
A.
计算机能够直接执行理解、执行汇编语言程序
B.
汇编语言程序是最早出现的高级语言
C.
低级语言学习使用很难,运行效率也低,所以已经被淘汰
D.
高级语言是与计算机型号无关的计算机语言
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