某跨度为1.8 m的板，设计混凝土强度等级为C20，则拆模时同条件养护的标准立方体试块的抗压强度标准值不低于()。
A. 5N/mm2
B. 10N/mm2
C. 15N/mm2
D. 20N/mm2
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听力原文：M: How do your friends and you come to school？
F: Let me see. Mike and Tom walk to school. Kate and I come by bus.
How does Kate come to school？
A. By bike.
By bus.
C. On foot.
______ she had never traveled herself, she received vicarious pleasure from reading about
A. Because
B. Since
C. Now that
D. Although
It is implied that many ecologists
A. believe the world's ecosystems is in an undesirable condition
B. agree that the environment of the world is not as bad as it is thought to be
C. appear somewhat unconcerned about the state of the world's environment
D. have thorough and comprehensive knowledge of the world's environment
What was the weather like that day？
A. It was sunny．
B. It was snowy．
C. It was rainy．
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