磷酸氢二胺(符合化学定义) ( )
A.10
B.12
C.14
D.16
参考答案:B
解析:归税号3105.3000。根据31章税目条文,按具体品目列名归类。
The sick boy ______ to hospital by the police yesterday.[ ]
A. is taken
B. was taken
C. takes
D. took
总的来说,砼的坍落度越大质量()。
A.越易保证
B.没关系
C.越难保证