人体活动范围最大的关节是()。
A.肩关节
B.肘关节
C.髋关节
D.膝关节
E.踝关节
参考答案:A
As for the influence of Internet, nowhere ( ) the results more clearly than in the US.
A.we have seen
B.we had seen
C.seen we have
D.have we seen
概算定额又称作( )定额。
A.台班
B.扩大结构
C.人工
D.机械