做4个交叉步需要几个八拍（）？
A、1个八拍
B、2个八拍
C、3个八拍
参考答案：B
防止子宫下垂的结构是（）。
A.子宫阔韧带
B.子宫主韧带
C.子宫圆韧带
D.骶子宫韧带
E.卵巢悬韧带
_________, Tom couldn't get his car to start. [ ]
A. Try as he may
B. As he might try
C. He might as try
D. Might he as try
