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【题目】We made a survey among 1,000 middle school students about their masks (口罩)for the coming school days. In general, every student will prepare 200 masks for it. The form below shows that the number of each student’s medical masks is________as large as that of Kn95 respirators (Kn95口罩).

surgical (外科) masks

(medical)

disposable(一次性)masks

medical

Kn 95 respirators

100

50

?

A.twiceB.three timesC.four times

【答案】B

【解析】

句意:我们对1000名中学生进行了一项调查,询问他们在即将到来的学校生活中需要佩戴哪些口罩。一般每个学生都会准备200个口罩。下面的表格显示每个学生的医用口罩的数量是Kn95口罩数量的3倍。

考查数学计算能力。根据“every student will prepare 200 masks for it”及表格中的数据,可知医用口罩的数量是150个(一次性医用+医用外科),那么Kn95口罩的数量是50个,所以每个学生的医用口罩的数量是Kn95口罩数量的3倍,故选B

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