在已知损失分布或者赔款分布的条件下，纯保险费率可以用赔款金额的期望值除以（）得到。
A.保险价值
B.损失金额
C.保险金额
D.总保费
参考答案：C
公安机关的职责是由( )所确认的。
A．党的政策 B．国家法律 C．政府法规 D．国家法律和法规
补全对话。
W: Hi, Sam! 1________.
M: I’m reading a book about magic(魔术).
W: 2_____ ?
M:. Yes, I like magic very much. My favorite magician is Liu Qian.
W: Do you want to be a magician?
M: 3________. I just want to know how he does his magic.
W: Magic is really interesting. I want to buy a book about magic, too. 4________ ?
M: In the Xinhua bookstore.
W: Can you go to the bookstore with me now?
M: 5________ . How about tomorrow afternoon?
W: Ok. Thank you.
