下述除哪项外,均属胎漏的特点()
A.孕后 * * 不时少量下血
B.或时下时止
C.腹痛, * * 下血
D.或下血淋漓不断
E.无腹痛、腰痛、小腹坠胀
参考答案:C
心源性哮喘与肺源性哮喘最重要鉴别是()
A.呼吸困难
B.咳嗽
C.咯粉红色泡沫样痰
D.水肿
E.发绀
He met many problems ______ he was going over his lessons.
A.before
B.as soon as
C.since
D.while