题目内容

A hinge joint is _____ permits forward and backward movement of a door.
A:the
B:whose
C:what
D:those

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某载货电梯，额定载重量为1000kg，轿厢最大有效面积为2.4m2，轿厢配有能在下行时动作的渐进式安全钳。按GB7588—2003《电梯制造与安装安全规范》规定，在交付使用前的检验中进行安全钳试验时，应在轿厢内装载1000kg的重量进行试验。()

()不是多媒体的主要特性。
A多样性
B交互性
C集成性
D大众性

The funny things is, I can never remember him ever _____.
A:to get dirty
B:get dirty
C:getting dirty
D:being got dirty

I work in a little room off the main entrance _____ museum, checking coats and other articles which people do not want to carry around as they tour the building.
A:to
B:of
C:at
D:for