一种计算机每秒可做4×108次运算，它工作3×103秒运算的次数为[ ] A．1

Instead of flocking into the cities, the peasants __________ villages and townships of a new type in the past few years.

A．had built

B．was building

C．have been building

D．built

芦荟的主治病证是（）

A.热结便秘

B.水肿臌胀

C.烦躁惊痫

D.小儿疳积

E.癣疮

How can I help____if people  just don't follow my advice?    [ ]

A. it    

B. that    

C. them    

D. this

对俯卧撑撑起阶段，上肢环节运动的原动肌工作进行分析。

企业培训存在的误区。