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【单选题】
关于消化性溃疡的治疗，正确的是A.
需长期应用黏膜保护剂以降低溃疡复发率
B.
为降低复发率，需长期服用质子泵抑制剂
C.
只要内镜证实溃疡已经愈合，溃疡就不会复发
D.
根除幽门螺杆菌可以降低溃疡复发率
E.
有消化道出血的溃疡患者必须长期维持治疗
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举一反三
【单选题】According to CISG, a contract can be established when _______.
A.
an acceptance becomes effective
B.
the seller and buyer sign on a weitten contract
C.
the contract is approved by authorities
D.
an offer reaches the offeree
【简答题】传感器一般由哪几部分组成?
【单选题】According to CISG, a contract can be established when ( )
A.
both seller and buyer sign on a written contract
B.
an acceptance becomes effective
C.
an offer reaches the offeree
D.
the contract is approved by authorities
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