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【单选题】
甲醛（CH 2 O）是室内污染的主要成分之一，它来源于室内装修所用的油漆、胶合板等材料。下列关于甲醛的说法错误的是A.
甲醛是由C、H、O三种元素组成
C.
甲醛分子中C、H、O原子个数比是1:2:1 C、一个甲醛分子含有四个原子
D.
甲醛分子是由一个碳原子和一个水分子构成
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【单选题】Which of the following is not true?A.Scientists consider apes may drive trains some day．##
A.
Which of the following is not true? A.Scientists consider apes may drive trains some day．
B.
Apes have worked in some factories．
C.
Apes may one day be used to gather crops．
D.
An ape is not a large monkey．
【单选题】Which of the following is not true?
A.
Scientists consider apes may drive trains some day．
B.
Apes have worked in some factories.
C.
Apes may one day be used to gather crops．
D.
An ape is not a large monkey.
【简答题】When scientists set out to explore the roots of human laughter, some apes（类人猿） were just tickled（胳肢）to help. That’s how researchers made a variety of apes and some human babies laugh. After yzing ...
【单选题】Which of the following is not tree?
A.
Scientists consider apes may drive trains some day.
B.
Apes have worked in some factories.
C.
Apes may one day be used to gather crops.
D.
An ape is not a large monkey.
【简答题】局部受压分为局部均匀受压和（）两种情况。通过对砌体局部受压破坏的试验表明，局部受压可能发生三种破坏：竖向裂缝发展引起的破坏、劈裂破坏和直接与垫板接触的砌体的局压破坏。其中直接与垫板接触的砌体的局压破坏仅在砌体材料强度过低时发生，一般通过（），可避免发生这种破坏。
【简答题】局部受压分为 和 两种情况。通过对砌体局部受压破坏的试验表明,局部受压可能发生三种破坏: 、 和直接与垫板接触的砌体的局压破坏。其中直接与垫板接触的砌体的局压破坏仅在砌体材料强度过低时发生,一般通过 ,可避免发生这种破坏。
【简答题】Some apes have __________ the ability to communicate with humans using sign language.
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