Nobody but Mary and Tom ____ late for school that day. [ ]
A. are
B. is
C. were
D. was
答案:D
BRCA-2基因突变可引起
A.乳腺癌
B.神经纤维瘤
C.恶性黑色素瘤
D.肾细胞癌
国际证券按收益状况可分为()。
A.短期证券
B.长期证券
C.固定收益证券
D.变动收益证券