Is that ______ pencil case?[ ]
A. he
B. him
C. his
D. he's
答案:C
上海证券交易所的综合指数有()。
A.上证成分股指数
B.上证380指数
C.上证综合指数
D.新上证综合指数
为何要实现烧结终点的准确控制?