试题与答案

下列不属于水分活度测定的方法有()。A、AW测定仪法 B、扩散法 C、溶剂萃取法 D、高锰

题型:单项选择题

题目:

下列不属于水分活度测定的方法有()。

A、AW测定仪法

B、扩散法

C、溶剂萃取法

D、高锰酸钾法

答案:

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阅读理解。

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     "Seahorses are possibly the best example of fathers caring for their young in the animal world," said

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1. What purpose does the first paragraph serve in the passage?

A. To provide background information.

B. To tell readers an interesting fact.

C. To bring in the topic interestingly.

D. To offer basic knowledge for the text.

2. How many kinds of animal dads does this text mention?

A. One.

B. Two.

C. Three.

D. Four.

3. Which of the following statements is TRUE according to this text?

A. The female hardhead catfish carries eggs in her mouth for 60 days.

B. The male marmoset takes care of the baby as soon as the mother gives birth.

C. The eggs stay in a pouch on a male seahorse's belly until they hatch.

D. Emperor penguins sit on eggs to keep warm during the freezing winter.

4. Who is the text mainly written for? 

A. Biologists.

B. Fish experts.

C. Ordinary readers.

D. American fathers.

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