水工建筑物的的荷载按作用随时间的变异性,可分为()
A.永久作用荷载
B.临时作用荷载
C.可变作用荷载
D.偶然作用荷载
E.动力作用荷载
参考答案:A, C, D
左旋咪唑:可使虫体肌肉痉挛性麻痹,发挥驱虫作用,也有()作用。
The little boy ___________ his hands before he ___________ anything yesterday.[ ]
A. washes, eats
B. washs, eats
C. washed, ate