问题
单项选择题
常用轴承的外径上偏差为()。
A.正
B.负
C.零
D.正或负
答案
参考答案:C
常用轴承的外径上偏差为()。
A.正
B.负
C.零
D.正或负
参考答案:C
假如你是李华。你的朋友Mike 染上了烟瘾,请你写一封信说服他戒烟。 要点如下:
词数:100-120 左右,信的开头和结尾已给出。 Dear Mike, Recently I have noticed that you are addicted to smoking. __________________________________________________________________ _____________________________________________________________________ _ ________________________________________________________________ _____ _ Quitting smoking is not as hard as you think. If you keep trying you will succeed. Yours, Li Hua |