消费税的纳税期限分别为（） A.1日、3日、5日、10日、15日 B.1个月 C.1_爱下问搜题

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问题多项选择题

消费税的纳税期限分别为（）

A.1日、3日、5日、10日、15日

B.1个月

C.1个季度

D.不能按照固定期限纳税的，可以按次纳税

答案

参考答案：A, B, C, D

证明题

设数列{a_n}、{b_n}、{c_n}满足：b_n=a_n-a_n+2，c_n=a_n+2a_n+1+3a_n+2（n=1，2，3，…），证明：{a_n}为等差数列的充分必要条件是{c_n}为等差数列且b_n≤b_n+1（n=1，2，3，…）。

补全对话，情景问答

从对话后的方框中选择适当的选项补全对话。

M: You look unhappy. 1_____
W: Oh… my clothes are out of style. I don't look cool.
M: Well, maybe you should buy some new clothes.
W: Yes, but I don't have enough money.
M: Huh. 2_____
W: I can't, because my parents want me to stay at home every night.
I argued with them about it.
M: Well, you shouldn't argue with your parents. 3_____
W: And guess what else is wrong?
M: What?
W: 4_____

A. My brother plays his CDs too loud! I can't go to sleep.
B. You should talk about your problems.
C. Maybe you could get a part-time job in the evenings.
D. What's wrong?