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问题 多项选择题

可引起急性弥漫性增生性肾小球肾炎的病原体有()

A．链球菌

B．葡萄球菌

C．肺炎链球菌

D．乙肝病毒

E．寄生虫

答案

参考答案：A, B, C, D

问答题

Directions:

A freshman, Jean, who is your friend, wants to get some advice from you about how to live a meaningful life in university. You should write a letter to her to offer your suggestions. In the letter, you should
1) give your advice to her, and
2) encourage her in her future study.
You should write about 100 words on

ANSWER SHEET 2

.
Do not sign your name at the end of the letter. Use "Li Ming" instead.
Do not write the address.
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单项选择题

决策时由于选择某一方案而放弃另一方案所放弃的潜在利益是（）

A.假计成本

B.历史成本

C.机会成本

D.共同成本
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