在深圳证券交易所，多只a股合计单向买入或卖出的交易金额不低于500万元人民币且其中单只a股的交易数量不低于()股的可采用大宗交易方式。
A.5万
B.10万
C.20万
D.100万
参考答案：C
解析：根据《深圳证券交易所交易规则》的规定，多只a股合计单向买入或卖出的交易金额不低于500万元人民币且其中单只a股的交易数量不低于20万股的，可采用大宗交易方式。
| 完形填空。根据上下文，用正确的选项完成短文。 |
| Li Ming, Danny, Jenny and Mrs. Li arrive 1 Beijing at 2:00 in the afternoon. Everyone 2 tired and hungry. There 3 many people in the Beijing Train Station. The 4 are buying tickets. The children are 5 cards. There are some men, too. Mrs. Li, Danny, Jenny and Li Ming 6 a cab to 7 hotel. Then LiMing, Danny and Jenny go 8 a walk. They walk down the street. The street 9 many cars, buses, bicycles and big trucks. The cars and bicycles go 10 . The buses and trucks go slowly. |
| ( ) 1. A. at ( ) 2. A. am ( ) 3. A. has ( ) 4. A. woman ( ) 5. A. playing ( ) 6. A. sit ( ) 7. A. their ( ) 8. A. for ( ) 9. A. have ( ) 10. A. slow | B. in B. is B. have B. womans B. plays B. sits B. his B. to B. haves B. slowly | C. on C. are C. is C. women C. play C. take C. they C. in C. has C. quick | D. to D.be D.are D.womens D.to play D. takes D.her D.of D.is D. quickly |