尖牙保护型的特点为（）。

A:侧运动时，工作侧只有尖牙形成接触 B:侧运动时，工作侧只有尖牙脱离接触 C:侧运动时，非工作侧只有尖牙形成接触 D:侧运动时，非工作侧只有尖牙脱离接触 E:非正中时，双侧尖牙形成均匀接触

SYN-BAD告警上报的原因可能是（）。

A:上报SYN-BAD网元的时钟板性能不好 B:时钟跟踪参数设置错误 C:母板插槽倒针 D:跟踪源（上游网元）的时钟质量不好

If such unhappy persons don't change their bad behaviour, what should people do according to the author______

A:People should avoid contact with them B:People should criticize their misconduct C:People should help them recognize the bad effects of the habit D:People should show no respect and politeness to them

The appeal of the world of work is first its freedom. The child is compelled to go to school: he is (21) of authority. As he grows up, he sees what it is to be free of school and to be able to choose his job and change it if he doesn’t like it. The boys and girls, (22) he has long observed, revisit school utterly changed and apparently mature. Suddenly teachers seem as out of date as his parents and the authority of school a ridiculous thing. At the moment the adult world may appear (23) the school world that the desire to enter it cannot be satisfied by exercises in school books. This may not be the (24) but it is a necessary part of growing up, for every man and woman must come sooner or later to the point of saying "Really, I’ve had enough of being taught; I must (25) ". Some young people come to this decision sooner than they ought. Yet in a way this is not a bad frame of mind to be in (26) leaving school. At work, the young man makes one of the first great acceptances of life——he accepts the discipline of the material or the process he is working with. He sees the point of it and in doing so (27) life. The work process constitutes a reality in some sense superior to that of school, and this is why he so often longs to get to grips with it. Nothing done in school imposes its will in (28) the same way; if the maths master is ill one can get on with something else. But even the boy delivering papers, (29) the driver taking out his bus, discovers that one cannot put it off because there is snow on the ground, or the foreman (工头) is easily annoyed, or he himself (30) that morning.

A:is in a bad mood B:has the bad temper C:has the bad humour D:has lost his mood

—Nancy's grades are really bad.
—Yes, but Tom's are ______.

A:bad B:worse C:worst D:well

Speaker A: I' ve got a fever and a really bad headache.
Speaker B:______

A:Why are you so careless about yourself B:This kind of thing happens to everyone. C:You should take good care of yourself. D:Oh, that's too bad. Why don't you take some aspirin

Speaker A: I’ ve got a fever and a really bad headache.
Speaker B:（）

A:Why are you so careless about yourself B:This kind of thing happens to everyone. C:You should take good care of yourself. D:Oh, that’s too bad. Why don’t you take some aspirin

The appeal of the world of work is first its freedom. The child is compelled to go to school: he is (21) of authority. As he grows up, he sees (22) it is to be free of school and to be able to choose his job and change it if he doesn’t like it. The boys and girls, (23) he has long observed, revisit school utterly changed and apparently mature. Suddenly teachers seem as out of date (24) his parents and the authority of school a ridiculous thing. At the moment the adult world may appear (25) the school world that the desire to enter it cannot be satisfied by exercises in school books. This may not be the (26) but it is a necessary part of growing up, for every man and woman must come sooner or later to the point of saying "Really, I’ve had enough of being taught; I must (27) Some young people come to this decision sooner than they ought. Yet (28) a way this is not a bad frame of mind to be in leaving school. (29) work, the young man makes one of the first great acceptances of life——he (30) the discipline of the material or the process he is working with. He sees the point of it and in doing so (31) life. The work process constitutes a reality in some sense superior to that of school, and this is (32) he so often longs to get to grips with it. Nothing done in school imposes its will in (33) the same way; if the maths master is iii one can get on with something else. But even the boy delivering papers, (34) the driver taking out his bus, discovers that one cannot put it off because there is snow on the ground, or the foreman (工头) is easily annoyed, or he him- self (35) that morning.

A:is in a bad mood B:has the bad temper C:has the bad humour D:has lost his mood

Speaker A: I' ve got a fever and a really bad headache.Speaker B:______

A:Why are you so careless about yourself B:This kind of thing happens to everyone. C:You should take good care of yourself. D:Oh, that's too bad. Why don't you take some aspirin

—Nancy's grades are really bad. —Yes, but Tom's are ______.

A:bad B:worse C:worst D:well