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问题 单项选择题

以下不属于孕期生理特点的是()。

A．易出现饱胀和消化不良

B．孕期对钙、铁的吸收增强

C．孕妇空腹血糖值高于非孕妇

D．孕期有效肾血浆流量及肾小球滤过率增加，肾小管再吸收能力没有相应增强

答案

参考答案：C

问答题

（2分）金属在生活中有广泛的应用，没有金属，生活是难以想象的．

（1）从金属元素的原子结构分析，你认为大多数金属易与其他物质发生反应的根本原因是　_________　．

（2）根据你平常的所见所闻及所学的化学知识，写出保护金属资源的方法（写一种即可）　_________　．
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As always, I am pleased to be here at the National Press Club for my (1) Speech. This is the seventh time I have had the (2) to give this speech, and over the years I have talked about a wide range of issues: (3) , reading, setting high expectations, improving the teaching profession, and (4) the American high school -- to name just a few.
I have just returned from a five-day, (5) tour of schools in rural America. We started in Monroe, Louisiana, and finished (6) later in Paducah, Kentucky. What I noticed most about the trip was the weather. Every time I (7) my Success Express School Bus, the local people who came to greet me (8) that the record for (9) had just been broken in their community. In each place, the temperature was always between (10) degrees.
Now, I have very good people on my staff. But the next time we plan a (11) , I’m going to have a (12) on my staff. I took this bus trip through rural America to make an important point that the (13) of children in our nation’s small towns cannot be ignored. Twenty-five percent of all our school children live in (14) all over America.
When it comes to our children, let’s always remember that children everywhere have (15) and (16) . Yet, schools in small towns too often have to (17) because of limited resources and a (18) . On my trip I put a p focus on the issues that matter in rural America, with a particular emphasis on (19) schools, reducing class size, and overcoming the (20) .
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