可动连锁种
参考答案：
能够从群落中的某丛或某株植物向另一丛或另一株植物运动，从而成为群落植物生存繁衍因素的动物种。
The patient is still weak in health, and is advised by the doctor ______ more exercise.[ ]
A. taking
B. should take
C. took
D. to take
物理气相沉积简称（）。
A.LVD
B.PED
C.CVD
D.PVD
