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问题 单项选择题

风湿性心脏炎，具有重要病理意义的早期表现是

A．心尖区全收缩期杂音

B．心尖区舒张期杂音

C．主动脉瓣区舒张期杂音

D．心脏明显扩大

E．心电图示P-R间期延长

答案

参考答案：C

选择题

The participants were encouraged to _______ others in the class to do the project, and the entire team would get credit.

A．keep up with

B．team up with

C．come up with

D．put up with
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单项选择题

了解人群口腔卫生习惯可通过

A．口腔健康咨询
B．捷径调查
C．问卷调查
D．口腔保健计划
E．口腔预防保健措施
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