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问题
单项选择题
消化性溃疡最主要的症状是
A．嗳气反酸
B．恶心呕吐
C．节律性上腹痛
D．无规律性上腹部痛
E．粪便黑色
答案
参考答案：C
选择题
Recently two pieces of wrapping paper dating from about 700 years ago ____ the earliest paper advertisements,much older than similar ads in the West.
A. have considered
B. considered
C. were considered
D. have been considering
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单项选择题
あれから（）1か月もたっていない。
A.もう
B.また
C.いま
D.まだ
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