问题
单项选择题
开车前，丙烯系统露点要达到（）。
A.-70%
B.-65%
C.＜-40℃
D.＜-23℃
答案
参考答案：C
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开车前，丙烯系统露点要达到（）。
A.-70%
B.-65%
C.＜-40℃
D.＜-23℃
参考答案：C
| 完形填空。 | |||
| There are two kinds of music in the world-one is written down and the other is not. Many people earn their living l music. They write songs for pop stars and music for films and TV plays. They usually write exact insitutions on 2 the music is played. Folk music has been passed down from one generation(一代人) to another. At first it was never written down. People _ 3 _ the songs from their families, relatives, neighbors and friends in the same village. These songs were _4 country life, the seasons, animals and plants, and about love and . 5 in people's lives. Early performers of music were popular and respected. They 6__learn hundreds of songs __7 . On festivals they used to act and sing in praise of heroes 8 lived long ago. This was at a time _ 9 there was no radio, TV or cinema. Many of the country people 10_ read nor write. In this way stories were passed on from one person to another. This continues even today. | |||
| ( )1. A. writing ( )2. A. why ( )3, A. learn ( )4. A. about ( )5. A. sad ( )6. A. were, used to ( )7. A. with heart ( )8. A. who ( )9. A. where ( )10. A. can neither | B. by writing B. when B. learnt B. to B. happy B. are using B. by heart B.whom B. in when B. can either | C. in writing C. what C. are learning C. for C. sorry C. used to C. to heart C. when C. that C. could neither | D. to write D. how D. studied D. into D. sadness D. usedn't to D. in mind D. Which D. when D. could either |