Thank you for your help. If you_________

题型:选择题

问题:

Thank you for your help. If you___________us, I think we_________doing it now.      [ ]

A. hadn't helped; must have been busy      

B. didn't help; must have been busy      

C. hadn't helped; must be busy      

D. didn't help;must be busy

考点:虚拟语气
题型:选择题

在气管食管沟内通过的是()

A.膈神经

B.副神经

C.喉上神经

D.喉返神经

E.舌下神经

题型:选择题

用括号内所给单词的适当形式填空。

1. The more we get together, the _____ (happy) we are.

2. We enjoyed _____ (us) at the party.

3. The radio station has the _____ (bad) music in the city. We don't like it.

4. Sanya has_____ (love) beaches and many visitors go there for vacation every year.

5. There ale a few _____ (different) between the twins.

题型:选择题

变色效应

题型:选择题

重铬酸钾法测定COD其中未包括的物质是()

A.非还原性无机物

B.不可生物降解的有机物

C.无机还原性物质

D.可生物降解的有机物

题型:选择题

下列选项中,( )不属于供配电系统管理工作的主要内容。

A.制定严格的供配电运行制度和电气维修保养制度,同时建立相应的检查监督机制保证各项制度的执行

B.建立临时用电管理制度,对任何新增加的用电都应进行用电负荷的计算,进行合理的负荷分配,尽可能保证三相平衡,任何情况下都不允许超负荷供电

C.配备必要的工具和安全防护用品,准备相应数量的零备件和易损易耗品

D.定期对用电计量仪表进行检查和校验,确保用电计量的准确性

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