【单选题】有关上消化道大出血的说法,正确的是
B.
上消化道大出血的临床表临现取决于出血的速度和部位
C.
一次性出血量800ml,占循环量的20%,可出现休克
【简答题】试述消化性溃疡并发上消化道大出血的止血措施。
【单选题】My teacher takes great trouble ______me learn English, since I have a lot of trouble _____it. [ ]
【单选题】"Without no seams nor needle work" means _________.
A.
with seams and with needle work
B.
without seam and without needle work
C.
without seams but with needle work
D.
with seams but without needle work
【单选题】If they ______ what I was saying, they’d know what I was talking about.
A.
took the trouble to listen to
B.
had trouble listening to
C.
take the trouble to listen to
D.
have trouble listening to
【单选题】在沉降作用明显的河流充分混合段,对排入河流的化学需氧量(COD)进行水质预测最适宜釆用()。