咯血患者主要死亡原因是()
A.失血性休克
B.呼吸衰竭
C.肺不张
D.咯血窒息
E.循环衰竭
参考答案:D
On both sides of the river bank _______. [ ]
A. stands rows of huts
B. stood rows of huts
C. do rows of huts stand
D. did rows of huts stand
驻车制动指示灯/制动液拉低警告灯是什么?