3×（﹣13）的结果是_刷题宝

题干

3×（﹣

1

3

）的结果是（　　）

A：-4

B：-1

C：- $\frac{1}{4}$

D： $\frac{3}{2}$

上一题下一题 0.0难度选择题更新时间:2019-12-24 02:42:22

答案(点此获取答案解析）

B

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某县坚持开展人大代表述职活动，通过人大代表的述职，人民群众对人大代表的监督由评议转变为对履职情况进行量化考核，当地百姓形象地把这种做法称为人大代表的“赶考”。该县人大代表的“赶考”
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④是公民对人大代表行使监督和质询权的体现

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世界最高的高原是（）

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“你希望别人怎样对待你，你就应该怎样对待别人。”这句话说明在与异性交往的过程中（）

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给下列句子编号。

Kate: Look, Mary! A girl is over there. Can you see her?

Mary: Which girl?

Kate: The one in the red coat under the apple tree. Do you know her?

Mary: That's Lily. Lily, how are you?

Lily: Very well, thank you, and you?

Mary: I'm fine too. This is my friend, Kate.

Lily: Nice to meet you, Kate.

Kate: Nice to meet you too.

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B. Which girl?

C. Look, Mary! A girl is over there. Can you see her?

D .The one in the red coat under the apple tree. Do you know her?

E. Very well, thank you, and you?

F. Nice to meet you, Kate.

G. I'm fine too. This is my friend, Kate.

H. Nice to meet you too.

____

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已知α为钝角，β为锐角，且sinα= $\frac{4}{5}$ ，sinβ= $\frac{12}{13}$ ，则 $\cos \frac{α - β}{2}$ 的值为（　　）

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