What does the word "materialise" mean in the second paragraph？
A. bomb
B. investigate
C. provoke
D. appear
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必须分析假设始发事件，以便确定所有可能影响核动力厂安全的内部事件。这些事件可能包括设备故障或误操作。需要考虑的故障类型取决于所涉及系统和部件的()。
A. 功能
B. 类型
C. 数量
D. 动作
在充装F22钢瓶时,HCFC22的充装系数按()kg/L进行充装。
A. 0.8
B. 1.02
C. 1.2
Which of the following descriptions about the amount of Vitamin D intake is true？
A. The upper limit of Vitamin D intake for adults is 400 lUs.
B. It is dangerous for adults to take 2,000 lUs Vitamin D daily.
C. An overdose of Vitamin D does not necessarily result in diseases.
D. For people under 50, it is safe to take 200 lUs Vitamin D daily.
Which of the following is true of Darwins theory of evolution？
A. It was initiated as a weapon against religion.
B. It offered solider evidences against religion than geology.
C. It split the religionists into two opposing groups.
D. It met strong oppositions from religionists.
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