如图，在Rt△ABC中，∠C=90°，∠B=30°，AB=8，则BC的长是

题干

如图，在Rt△ABC中，∠C=90°，∠B=30°，AB=8，则BC的长是（）

A： $\frac{4 \sqrt{3}}{3}$

B：4

C：8 $\sqrt{3}$

D：4 $\sqrt{3}$

上一题下一题 0.0难度选择题更新时间:2018-04-21 01:06:13

D

A. Do you play basketball every morning?

B. Let's meet at 7am.

C. What time do you go to bed at night?

D. I played basketball yesterday.

E. Do You often stay up late?

F. I have a healthy lifestyle.

G. I exercise every day.

A: Good morning, Bill.

B: Hi, Nick.

A: ____

B: Yes, I like playing basketball. How often do you exercise?

A: ____

B: Do you get up early in the morning?

A: Yes, I get up at 6:30 every morning. And then I play basketball for half an hour.

B: ____

A: I go to bed at 10:00. ____

B: I see. You look strong. Let's play basketball together tomorrow morning, OK?

A: All right. ____ See you.

B: See you tomorrow.