— Are ___________ onions?
— Yes, they are. [ ]
A. this
B. that
C. these
答案:C
尿液防腐保存时,每升尿液加甲苯()
A.1~5mL
B.5~20mL
C.25~40mL
D.45~60mL
E.65~70mL
球速快、角度大、突然性强,并向对方右侧偏拐的发球技术是()
A.平击发球
B.正手发奔球
C.反手发急上旋球
D.拉弧线球