精子获能是在()
A.附睾
B.睾丸
C. * *
D.宫颈管
E.输卵管和子宫腔
参考答案:E
I think it ______ that one have a good command of English if one wants to be engaged in
international trade. [ ]
A. useful
B. a must
C. essential
D. vital
下列各项中,不属于资产类项目的是( )。
A.应收账款
B.预提费用
C.银行存款
D.预付账款