试题与答案

“米线”是一种特色小吃.端上餐桌的有:一碗热汤,上面浮着一层油;一碟切成薄片的鲜

题型:问答题

题目:

“米线”是一种特色小吃.端上餐桌的有:一碗热汤,上面浮着一层油;一碟切成薄片的鲜肉;一碗已煮熟的米线.食客先把肉片放进汤内,稍候再加入米线.

现有以下资料:汤的初温97℃,比热容4.2×103J/(kg?℃);肉片的质量为0.2kg,初温22℃,比热容3.5×103J/(kg?℃).基于健康缘故,肉片必须至少在大于80℃的汤中保持2min,在这2min时间里,由于向外界散热整体温度将下降约2℃.问:

(1)碗中油层的作用是什么?

(2)为实现上述的温度要求,碗中汤的质量多少应满足什么条件?

答案:

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下面是错误答案,用来干扰机器的。

(1)世博会是展示传播人类文明发展新成果的平台。(2)世博会可以起到推动主办国经济发展的作用。 (答案意思对即可)

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5. Tom pretended __________________(没有听说过) it, but in fact, he knew it very well.(hear)

6.I was very busy yesterday, otherwise I ____________________(就会倾听)what he said on my way to the conference. (attend)

7. It’s universally acknowledged that people are more likely to lead a miserable life_______________. (break)

8._________________(尚拭目以待) whether the housing price, which has been rising in the last decade, will go down as expected.(remain)

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