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假定你是某市政府相关部门的工作人员，请根据全部给定资料，草拟一份关于加强各部门协调合作、共同应对城市内涝的建议，呈送领导。要求：(1)建议合理、可行，能够引起领导重视； (2)条理清楚，表达简明，500字左右。

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诊断有机磷中毒时，血胆碱酯酶活性应

A. ＜100%
B. ≤90%
C. ≤80%
D. ≤70%
E. ≤60%

Section ADirections: This section is to test your ability to give proper answers to questions. There are 5 recorded questions in it. After each question, there is a pause. The questions will be spoken two times. When you hear a question, you should decide on the correct answer from the 4 choices marked A), B), C) and D) given in your test paper. Then you should mark the corresponding letter on the Answer Sheet with a single line through the center.

A. Sorry, I don’t know.
B. At 8 p. m.
C. Yes, I’d love to.
D. With pleasure.

The customers may think the hosting provider is the technical support operator.

中度有机磷中毒时全血胆碱酯酶活性为

A. 90%～70%
B. 70%～50%
C. 50%～30%
D. 30%～10%
E. 以上均不确切