There is a new problem involved in the popularity of private cars ______ road conditions need _______刷题宝

题干

There is a new problem involved in the popularity of private cars ______ road conditions need ________.

A：that; to be improved

B：which; to be improved

C：where; improved

D：when; improving

上一题下一题 0.0难度选择题更新时间:2018-01-28 05:02:31

答案(点此获取答案解析）

A

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被称为“世界屋脊”的地形区是（　　）

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Maggie has been fortunate to find a job she loves and , ______ ,she gets well paid for it.

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让具有两对相对性状的俩纯合豌豆植株作亲本进行杂交获得F₁，F₁再自交得到F₂，F₂中黄色圆粒、黄色皱粒、绿色圆粒、绿色皱粒的比例为9∶3∶3∶1，与F₂出现这样的结果无直接关系的是

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如图，AB是⊙O的直径，点C是⊙O上一点，AD和过点C的切线互相垂直，垂足为D，直线DC与AB的延长线相交于P．弦CE平分∠ACB，交直径AB于点F，连结BE．

（1）求证：AC平分∠DAB；

（2）探究线段PC，PF之间的大小关系，并加以证明；

（3）若tan∠PCB= $\frac{3}{4}$ ，BE= $5 \sqrt{2}$ ，求PF的长．

同类题5

根据对话内容，从右边方框中选出适当的选项补全对话。

（情景交际之商场购物。）

A: Good morning! Can I help you?

B: ____ I need a T-shirt for sports.

A: OK.____

B: Blue.

A: How about this one?

B: ____ How much is it?

A: 80 yuan.

B: That's too expensive.____

A: OK. And we have socks for only 5 yuan each pair. Do you need a pair?

B: Great! ____

A: Here you are.

A. Then I'll take a blue T-shirt and a pair of white socks, please.

B. What color do you like?

C. How about 60 yuan?

D. It looks nice.

E. Yes, please.

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