训练负荷是训练状态和训练目标的核心组成部分。 ( )
参考答案:错
I believe that those mountains ________ with trees in a few years’ time.
A.are covered
B.will be covered
C.are covering
D.will cover
目前在我国预应力混凝土大直径管桩的生产中采用了()等工艺。
A.高速离心
B.振动
C.辊压
D.二次振捣
E.真空吸水