超精密磨削时,砂轮与工件间保持一定的磨削压力,实际背吃刀量()名义背吃刀量。
A.小于
B.大于
C.等于
参考答案:A
短文填空。(根据首字母提示填空)
A: Shall we have dinner now?
B: I can't eat a 1 I'm not feeling well today. I have a headache.
A: You may b 2 ill.You must s 3 the doctor i 4 you are ill.
B: I don't know w 5 the doctors are.
A: I know agood d 6 near the park. Shall I call him?
B: No, thanks. I t 7 feel better tomorrow.
A: Well, go to bed early and have enough r 8 .
B: I have to study. We are going to have an English test tomorrow. I'm a 9 I'll fail(不及格)in the test.
A: B 10 I'm afraid you can't study with a terrible headache.
通常,人们按照地理方位,把亚洲分为东亚、_______亚、_____亚、_____亚、北亚和_____亚6个地区。