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【多选题】
事故树中的顶上事件一般考虑以下哪些事件?A.
对安全构成威胁的事件
B.
妨碍完成任务的事件
C.
发生频率大的事件
D.
严重影响经济效益的事件
E.
后果最严重的事件
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Suppose there is an increase in input prices. We would expect supply
A.
supply to increase, supply curve shift to the right.
B.
supply to decrease, supply curve shift to the left.
C.
supply and supply curve to remain unchanged.
D.
supply to either increase or decrease.
【单选题】Suppose there is an early freeze in California that ruins the lemon crop. What happens to consumer surplus in the market for lemons?
A.
It increases.
B.
It decreases.
C.
It is not affected by this change in market forces.
D.
It increases very briefly then decreases.
【单选题】Suppose there is an increase in input prices. We would expect supply
A.
to decrease
B.
to increase
C.
could increase or decrease
D.
to remain unchanged
【简答题】以下关于字符串处理正确的是哪一项？A. +号可以用来拼接两个字符串，对于以下代码的输出字符串是Python >>> prefix = "Py">>> prefix + 'thon'B. 字符串是自带索引的，对变量word = " Python " ，word[1]是字符y，但是word[-1]会报越界错误。C. 字符串的索引有两个边界，前边界和后边界都是包括的。D. 对于字符串 " apple "...
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