柴油机转速试验时,柴油机转速从1000r/min降到430r/ln5n的时问为()。
A.20-22s
B.18-20s
C.15-18s
参考答案:C
柴油机转速试验时,柴油机转速从1000r/min降到430r/ln5n的时问为()。
A.20-22s
B.18-20s
C.15-18s
参考答案:C
A. radio stations use hotlines in a wrong way
B. it is a fact
C. some people have unclear thoughts
D. it is a good idea
2. Which of the following is not true? [ ]
A. Some people know little about the topic under discussion.
B. Some people do not know what the host is talking about.
C. Some people do not know what the show is about.
D. The author tells us that the host is silly.
3. The host has tto answer and explain ______. [ ]
A. because he works hard
B. because of the caller's ignorance
C. because he likes talking to the caller
D. because of a lot of questions raised by the caller
4. The passage does not tell us the idea ______. [ ]
A. that some listeners phone the hotline for fun
B. that some people just want to be heard by others
C. that some people don't care how they appear to be silly
D. what the hotline programs are
5. The Chinese meaning of the underline word "operator" probably is _____. [ ]
A. 导播
B. 听众
C. 医生
D. 主持人