刃厚皮片移植成活后深感觉恢复的时间
A.1周
B.3周
C.2周
D.1个月
E.2个月
参考答案:B
I hope we will have _____ people and _____ pollution. [ ]
A. fewer; less
B. fewer; fewer
C. less; less
D. less; fewer
在距离丈量中,衡量其丈量精度的标准是()
A.相对误差;
B.中误差;
C.往返误差