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There is a reason for companies to invest only when people

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Questions 11—13 are based on the following passage about the strikes. You now have 15 seconds to read Questions 11—13. Why are British employers so afraid of unofficial strikes

A. Such strikes are against the British law.
B. Such strikes are unpredictable.
C. Such strikes are more difficult to control.
D. Such strikes are very common these days.

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某省人民政府收到《某省教委关于加强教师队伍建设问题的报告》以后，经研究认为文件针对的问题十分重要，文中的建议切实可行，决定对该文加注批语后下发施行，为此，制发一文件。

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Questions 17—20 are based on the following passage about phrase books. You now have 20 seconds to read Questions 17—20. According to the speaker, what kind of problems do phrase books have

A. They are actually useless.
B. They have a practical problem.
C. They should be designed in more phrases.
D. They don’t provide enough useful phrases.

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某地一民用建筑中，占地面积2000m2，顶棚表面局部采用泡沫状塑料，现对其进行装修，装修涂料选用防火涂料。住宅隔墙间设防火墙，内部装修设有安全出口，疏散出口等，楼道内装有自动灭火系统。顶棚内采用泡沫塑料时，应涂刷防火涂料。防火涂料宜选用耐火极限大于30分钟的超薄型钢结构防火涂料，湿涂覆比值应大于( )g/m2。

A. 200
B. 400
C. 300
D. 500

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