题目内容

石灰是水硬性胶凝材料，可以用于潮湿的环境中。( )

A. 对
B. 错

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水泥和水拌和后，只能在水中硬化，而不能在空气中硬化。( )

A. 对
B. 错

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建筑图纸上的标高是以米为单位。( )

A. 对
B. 错

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材料孔隙越大，容重越小，其密度比重也越小。( )

A. 对
B. 错

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Questions 17 to 20 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions. Now listen to the passage. What is the focus of people’s attentions today according to the passage

A. designing better cars.
Building more highways.
C. Increasing people’ s awareness of traffic problems.
D. Enhancing drivers’ sense of responsibility.

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石灰是水硬性胶凝材料，可以用于潮湿的环境中。( )

A. 对 B. 错

水泥和水拌和后，只能在水中硬化，而不能在空气中硬化。( )

建筑图纸上的标高是以米为单位。( )

材料孔隙越大，容重越小，其密度比重也越小。( )

Questions 17 to 20 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions. Now listen to the passage. What is the focus of people’s attentions today according to the passage

A. 对
B. 错