振冲法在黏性土地基中的作用主要是( )。
A.振冲挤密
B.振冲液化
C.排水固结
D.振冲置换
参考答案:D
Before the storm,fishes in the pond usually________themselves out of the water to get fresh air.[ ]
A. throw
B. run
C. swim
D. escape
酮体合成酶系存在于()
A.胞液
B.线粒体基质
C.内质网
D.线粒体内膜