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【单选题】
尿素呼吸试验的注意事项中错误的是A.
检查前停用抗生素和铋剂至少30天，停用硫酸铝和质子泵抑制剂至少2
B.
禁食4～6小时，检查前用柠檬酸水漱口
C.
设备获得的测定值与Hp感染程度有明确线性关系
D.
胃大部切除后等胃排空过快患者，检查时可以取卧位，减缓胃排空，以减少假阴性
E.
在肺功能不良的患者可能会影响碳呼出的峰时与呼出量
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举一反三
【单选题】-- What a pity! You missed the beginning of the movie, it __ for 10 minutes. -- Oh, a traffic jam!
A.
began
B.
stated
C.
has been on
D.
has been off
【单选题】— I'm leaving tomorrow. — Oh, what a pity! I won't be able to see you off. I __ a tele-conference the whole morning.
A.
have
B.
am having
C.
will be having
D.
will have had
【单选题】听力原文：M: Would you show me a pair of brown shoes in size six, please? F: Oh, what a pity! We have no size six left. Where are the speakers now?
A.
In a factory.
B.
In the classroom.
C.
In a shop.
【单选题】— Oh! What a pretty toy car! Dad, would you be kind enough to get ____ for me? — What? Didn't I buy ____ for you as a birthday present? [ ]
A.
this; that
B.
that; it
C.
one; this
D.
it; one
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