分组装配法是以经济成本制造的低精度零件,因此装配出的机器精度不高。()
参考答案:错
下列哪项属于肾阳虚的症状()
A.脉无力而迟缓
B.午后潮热
C.心烦不安
D.舌干红
E.阳事易兴
We mustn't take _____. We'd better play _____. [ ]
A. chance; safe
B. chances; safe
C. a chance; safety
D. a chance; safely