用来估计胎儿大小的径线是()
A.枕下前囟径
B.枕额径
C.枕颏径
D.双顶径
E.双颞径
参考答案:D
首次行该操作时,抽液量应
A.<100ml
B.100~200ml
C.300~500ml
D.600~800ml
E.1000ml
Our research attempts to ______________ the effectiveness of the different drugs. [ ]
A. weigh
B. evaluate
C. measure
D. estimate