电缆沟、隧道的纵向排坡度,不得小于( )。
A.0.1%
B.0.2%
C.0.5%
D.1%
参考答案:C
Helen _____________ beautifully and she likes _____________ very much.[ ]
A. dances; dancing
B. dancing; dances
C. dance; dance
D. dance; to dance
不同商品耐碱性能力差异()。
A、很大
B、不大
C、很小
D、不大不小