【单选题】【消耗次数：1】
上消化道出血最常见的原因是
①
消化性溃疡
②
食管胃底静脉曲张
③
急性胃粘膜损害
④
胃癌
⑤
慢性胃炎
参考答案：
复制
纠错
相关题目
随机题目
【单选题】
Not until all the fish died in the river ___ how serious the pollution was.
①
did the villagers realize
②
the villagers realized
③
the villagers did realize
④
didn’t the villagers realize
【单选题】
The noise was so ____ that only those with excellent hearing were aware of it.
①
dim
②
soft
③
faint
④
gentle
【单选题】
His landlady gave him a weeks ___ to leave the flat.
①
threat
②
notice
③
advice
④
caution
【单选题】
Why not buy a cheaper one, ___ you don’t have enough money?
①
since
②
because
③
for
④
though
【单选题】
I don’t think you’ll be able to understand this formula（公式）___ you finish school.
①
as if
②
only when
③
even
④
even when
【单选题】
With the popularity of smartphones, the micro blog __________ a good platform for the young to show themselves gradually.
①
becomes
②
has become
③
is becoming
④
became