题目: 设计依据站和主要参证站的悬移质含沙量、输沙率、颗粒级配、矿物组成属于()。A.自然地理资料B.流域特征资料C.气象资料D.泥沙资料 答案: 参考答案:D解析:设计依据站和主要参证站的悬移质含沙量、输沙率、颗粒级配、矿物组成,推移质输沙量、颗粒级配等泥沙资料,设计断面或河段床沙的组成、级配及泥石流、滑坡、塌岸等资料属于泥沙资料。
题型:完形填空 完形填空. Last Wednesday, Mr Chen took his class to the Space Museum. There 1 _many things about space there. First, the children saw a film about space travel. They saw 2 _ the space shuttle took off in space and later landed on earth 3 . It was very exciting and the children felt they were traveling in space 4 ! After the film, Mr Chen took 5 to see some models of rockets . 6 _ the space shuttle. The models looked very real, but they were much 7 . Then the children saw some moon rocks. Two 8 landed on the moon in 1969. They put an American flag there. Then they took some rocks back to the 9 . 10 the children left, they also watched a video about people living and working in a space lab. People could stay in the space lab for months.( )1. A. is ( )2. A. how ( )3. A. too ( )4. A. itself ( )5. A. their ( )6. A. or ( )7. A. small ( )8. A. Americans( )9. A. moon ( )10. A. After B. are B. what B. already B. ourselves B. them B. but B. smaller B. EnglishmenB. star B. As soon asC. was C. when C. again C. oneself C. they C. and C. big C. AustraliansC. earth C. Until D. were D. which D. badly D. themselves D. theirs D. then D. bigger D. Chinese D. sun D. Before 查看答案
题型:单项选择题 某投资者拥有某家公司股票10000股,现有股价为52元。该投资者担心可能在未来两个月内下降,因此购买了该公司的看跌期权合同,行使价为50元。如果每股有报价的期权价格为1元,这个套期策略的总成本是( )。A.10000元B.20000元C.1元D.5000元 查看答案