用（）将牵引销通过两个M24×55螺栓紧固在车体的梯形槽内。
A、压板
B、止板盖
C、螺栓
D、铆钉
参考答案：A
根据答句填问句。
1．A: ________ ________?
B: That's Mike. He's Peter's cousin.
2．A: ________ ________ ________?
B: She is funny and outgoing.
3．A: ________ ________ ________ ________ ________ ________?
B: My uncle is tall and has short curly brown hair.
4．A: ________ ________ ________?
B: The bank is next to the supermarket.
5．A: ________ ________ ________ ________?
B: I'd like a glass of milk and a medium pizza.
市场体系由两大类市场构成，即（）。
A.商品市场和生产资料市场
B.消费资料市场和生产资料市场
C.商品市场和生产要素市场
D.金融市场和技术市场
