问题 选择题
在Rt△ABC中,CD是斜边AB上的高线,已知∠ACD的正弦值是
2
3
,则
AC
AB
的值是(  )
A.
2
5
B.
3
5
C.
5
3
D.
2
3
答案

在Rt△ABC中,CD是斜边AB上的高线,

因而∠B=∠ACD,

∴sin∠B=sin∠ACD=

AC
AB
=
2
3

故选D.

完形填空

第二部分完形填空(共10小题;每小题2分,满分20分)

阅读下面短文,掌握其大意,然后从21-30各题所给的A, B, C 和 D 项中,选出最佳选项,并在答题卡上将该项涂黑.

Several months ago, I got into a terrible car accident. That moment __21___ my view about life.

All my life I had been waiting until I could __22___ my driver’s license(执照) and my first car. When I __23___ got my license and my dad brought the car to the house, I was __24___. Every time I got into my car, I felt invincible(不可战胜的), as if nothing could stop me. But one day I was shown that I could be __25___, just like every other person.

One __26___, though it was very dark outside, I was in the car with some of my close friends. While driving down a main street, I felt I was __27__ control of the car. It was flying.

After the accident, I don’t remember much, but I do remember the __28__ I was in, not only physical but also the thought that others’ lives were in my hands for a few seconds and I might have __29___ them.

I learned a lot from that __30____. Not only did I learn that I need to have more appreciation(欣赏,理解) for things, I also learned that material things should never be the most important in our life.

21.        A. caught                    B.changed                    C. replaced                                 D. destroyed

22.        A. borrow                   B. buy                         C. get                                        D. see

23.        A. finally                   B. sadly                       C. unluckily                               D. suddenly

24         A. angry                     B. worried                    C. surprised                                D. excited

25.        A. warned                   B. beaten                      C. lost                                        D. disturbed

26.        A. morning                 B. afternoon                 C. night                                     D. noon

27.        A. shaking                  B. taking                      C. trying                                    D. losing

28.        A. pain                       B. joy                          C. disappointment                       D.happiness

29.        A. raised                     B. killed                       C. poisoned                                D. forgotten

30.        A. exprience                B. story                        C. vacation                                 D. rescue

多项选择题