节假日或双休日,和爸爸、妈妈去郊游并野炊实为一大快事,临行前对野炊有经验的人会告

题型:问答题

问题:

节假日或双休日,和爸爸、妈妈去郊游并野炊实为一大快事,临行前对野炊有经验的人会告诉你一些注意事项,请你给予解释:

(1)野炊时携带的餐具最好是铝制的,你认为原因可能是什么?

(2)在火堆上悬挂野炊锅时,应调节野炊锅的高度,你认为原因可能是什么?

(3)在引燃细枯枝后,如果迅速往“灶”里塞满枯枝,结果反而燃烧不旺,并产生很多浓烟,说明物质充分燃烧需要的条件是什么?

考点:燃烧与燃烧的条件金属的物理性质和用途
题型:问答题

Now more and more people in the world are getting fatter. This troubles them a lot. (1)Experts(专家) say that it has a lot to do with our eating habits.

Our eating habits are very important for good health and a strong body. Most of us like eating sweets and ice cream better than vegetables and rice. Sweets and ice cream are not bad for us if we eat them at the end of a meal. (2)If we eat them before a meal, they may take away our appetite(食欲).

It’s important for us to eat our meal in the same period each day. When we feel worried or excited, we may not want to eat. A long time ago, in England, some judges(法官) often decided whether a man was telling the truth by giving him some dry bread. If the man could not swallow(吞) the bread, it meant that he wasn’t telling the truth. Because when a man is worried about something, he will have trouble in swallowing anything dry, because he loses his appetite.

小题1:Are more and more people getting fatter in the world?________________________       ___

小题2:Do most people like eating sweets or rice?_______________________            ________

小题3:What may happen to people when they feel worried or excited?____            __________

小题4:将短文中画线句子(1)处翻译成汉语。                          

小题5:将短文中画线句子(2)处翻译成汉语。                           

题型:问答题

下列属于医院基本膳食的是 ()

A.流质膳食

B.低蛋白膳食

C.低盐膳食

D.少渣膳食

E.低脂膳食

题型:问答题

下列哪种方法估计排卵日期最简便()

A.孕激素试验

B.尿孕二醇测定

C.基础体温测定

D.子宫内膜活检

E.放射免疫法测血浆中LH

题型:问答题

汽车和内燃机的净化措施就是研究如何控制汽车排气中这些物质的含量。

题型:问答题

跨式组合与异价跨式组合的差别是什么?

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