问答题简答题：什么是煤气露点温度？

题型：填空题

下图是培育表达人乳铁蛋白的乳腺生物反应器的技术路线。图中tetR表示四环素抗性基因，ampR表示氨苄青霉素抗性基因，BamHⅠ、HindⅢ、SmaⅠ直线所示为三种限制酶的酶切位点。据图回答：

为检测人乳铁蛋白是否成功表达，可采用（）（填字母代号）技术。

A．核酸分子杂交

B．基因序列分析

C．抗原一抗体杂交

D．PCR

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题型：完形填空

阅读下面短文并回答问题，然后将答案写在相对应的位置上（请注意问题后的词数要求）。

[ 1 ]There are a lot of questions about how to get the most nutrients out of the food we eat. Nowadays, many questions arise as we consider the effect of new technology on the quality of our food. Read on to find out how technology is affecting what you eat.

[2 ]Are microwaves a good way to heat up foods? Studies say no. Microwave cooking destroys some important nutrients in vegetables. Broccoli(西兰花), when being microwaved, loses 97 percent of its cancer-protecting antioxidants (抗氧化物) compared to steamed broccoli, which loses 11 percent.

[3 ]Freezing food is a way of maintaining water content levels and temporarily stopping the growth of microorganisms and bacteria. In general, it doesn't lessen nutritional value when the food is of peak quality. It is only when the food is stored for a long period of time that it starts to lose nutritional values of vitamins, especially vitamins B and C.

[4 ]In general, when you dry foods, you take the water content out. You don't necessarily destroy the nutriments, although in fruits, certain vitamins can be easily destroyed. Dried foods are nearby as beneficial as fresh foods, though you end up eating a higher quantity of dried foods than_____________.

[5 ]One of the biggest complaints about organic (有机的) foods is that they are more expensive than commercially grown ones. However, what you may be saving now on commercial products will surely be lost in health care later. Many scientific studies have shown up the negative effects of pesticides (杀虫剂) used on commercial crops. The primary reason for buying organic foods is that you can get nutrient-rich foods which aren't covered with dangerous chemicals.

小题1:What is the best title of the passage? (no more than 8 words)

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小题2:Complete the following sentence with words from Paragraph 5. (no more than 4 words)

What people complain most about organic foods is that they have to pay more for them than______________.

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小题3: Fill in the blank in Paragraph 4 with proper words. (no more than 3 words)

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小题4:Why does the writer advise people not to use microwaves to heat up food?

(no more than 10 words)

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小题5: What does the word "it" (Line 2, Paragraph 3) probably refer to? (no more than 3 words)

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