(单选题)8: ― Where have you been lately? ― _________________. A: I’ve been to Shanghai on business B: I’ve a lot of work to do C: Everything is fine D: Yes, I haven’t seen you either ...

(单选题)2: If you _____your work, you can go there first. A: will finish B: finished C: finishing D: have finished ...

(单选题)16: I crossed the street to avoid _______ him, but he saw me and came running towards me. A: meeting B: met C: meet D: to meet ...

(单选题)10: The purpose of new technology is to make life easier, ______ it more difficult. A: not making B: not make C: nor to make D: not to make ...

(单选题)4: To my disappointment, the teacher_____ when I _____ at the office. A: left, had arrived B: left, arrived C: had left, had arrived D: had left, arrived ...

(单选题)1: 题目和选项如下： A: A B: B C: C D: D ...

(多选题)1: 平衡燃气输配系统供需平衡的方法有（ ）。 A: 改变气源生产能力 B: 利用缓冲用户 C: 发挥调度的作用 D: 利用储气设施 ...

(判断题)15: 城市燃气在气量分配时应兼顾工业与民用。 A: 错误 B: 正确 ...

(判断题)9: 用户处压力的最大波动范围就等于计算压力降。 A: 错误 B: 正确 ...

(判断题)3: 双座阀调压器不存在单向力，但阀门不能保证关闭严密。 A: 错误 B: 正确 ...