( )是针对企业应纳税所得额进行征税的税种。
A．企业所得税B．增值税C．资源税D．消费税
参考答案：A
下列有机硫化物中，（）可作为天然气的加臭剂。
A.乙硫醇
B.甲硫醚
C.甲硫醇
D.硫化碳
It's ten years since the scientist _____ on his life's work of discovering the valuable chemical. [ ]
A. made for
B. set out
C. took off
D. turned up
