当无力喊叫时,最有效的呼救方法是()。
A、用石块或铁具敲击金属管子或墙壁
B、用手握拳打击木板或玻璃
C、用脚踢或蹬金属管子或墙壁
参考答案:A
This vase ________ perfect but for a few small holes in its base.
A.would have been
B.should have been
C.shall be
D.would be
贲门痉挛的征象是()
A.食管下端不规则充盈缺损
B.食管下端狭窄,边缘呈锯齿状
C.食管下端狭窄,边缘光整,黏膜正常
D.食管下端狭窄,轮廓僵硬不能扩张
E.食管下端中断,钡剂无法下行