题目内容

--- Why is Grace’s Chinese so good? --- Because she ________ China for ten years.

A. has gone to
B. has been to
C. has come to
D. has been in

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急性上呼吸道感染潜伏期多为

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B. 5天
C. 2-3天
D. 10天

婴幼儿阶段最常见的疾病中呼吸系统急性感染发病率最高病情也比较严重

A. 对
B. 错

急性上呼吸道感染护理时应注意充分休息

A. 对
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