题目内容

____ you are invited to speak; you should be quiet at the meeting.

After
B. if
C. Because
D. Unless

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She drinks too much ice water,____ it is not good for her.

A. after
B. because
C. although
D. till

____ everybody knows about it, I will not explain it again.

A. Now that
B. Even
C. However
D. Unless

患者，男性，30岁，因“黑便3天”入院，诊断为“上消化道出血，十二指肠溃疡”，予抑酸、止血治疗。下列情况提示该患者有再出血可能的是

A. 黑便次数增多
B. 黑便变为暗红色
C. 肠鸣音减弱或消失
D. 血红蛋白持续降低
E. 血尿素氮降低

1.流感的免疫状况为

A. 病后可获得稳固免疫力
B. 接种疫苗后可获得稳固免疫力
C. 病后可获得对同型病毒的免疫力低
D. 各亚型之间有交叉免疫力
E. 接种疫苗后对同一亚型的变种无交叉免疫力