密度上限测定的现场实验中井浆的上限有（）变化情况。
A、一种
B、两种
C、三种
D、多种
参考答案：B
After graduation she reached a point in her career _____she needed to decision what to do. [ ]
A. that
B. what
C. which
D. where
连续性被动运动的缩写是（）
A.CPM
B.RPE
C.RPP
D.MTT
E.ICF
