问题
判断题
我国期货交易秉承“公开、公平、公正”的原则。（）
答案
参考答案：对
搜题请搜索小程序“爱下问搜题”
我国期货交易秉承“公开、公平、公正”的原则。（）
参考答案：对
| 选择下列词汇，完成下面对话。 | |
Paul: Yes, 1 have been to Shenzhen. Sally: How did you go there, by bus or hy train? Paul: Neither. I went by ________(2). Sally: When did you go there? Paul: Last year. When I ________(3) there, it was already midnight. It ________(4) me 3 hours. Sally: What do you think of Shenzhen? Paul: Very nice, and people there are ________(5) nicer |
某种混合气体由A、B两种可燃气体组成。各组分的浓度及爆炸下限见下表，则这种混合气体的爆炸下限为（）。
| 组分名 | 在混合气体中的浓度 | 爆炸下限 |
| A | 80% | 4% |
| B | 20% | 2% |
A．2.5%
B．3.0%
C．3.3%
D．3.7%