参与构成肘关节的结构是（）
A.肱骨小头
B.肱骨内上髁
C.肱骨头
D.尺骨茎突
E.桡骨茎突
参考答案：A
—What did Yang Ying say?
—She said they _____ a school trip the next weekend. [ ]
A. will have
B. had
C. would have
D. have
制动器调整的太紧，会使起升机构产生（）现象。
A.溜钩
B.不能吊运额定起重量
