寒凝心脉型胸痹心痛的特点是
A．心胸隐痛，痛无定处B．心痛如刺，痛有定处C．心胸绞痛，心痛彻背D．心胸灼痛，时作时止
参考答案：C
羊水过少时可出现：
A．B超下AFI≤5.0cm
B．破膜时羊水粘稠浑浊
C．羊膜表面常可见多个圆形结节，不透明
D．电镜下可发现鳞状上皮化生现象
E．胎儿删掉窘迫
— The weatherman on the news said it might rain later on this afternoon.
— Well, I ____ take my umbrella along with me today. [ ]
A. can
B. may
C. could
D. must
