重度精神发育迟滞患者的心理年龄约为（） A.3岁以下 B.3～6岁 C.6～9岁 D

根据题意及首字母提示填空。

1. Elephants are the most e______ animals in the world.

2. That zoo is s______ for animals to live in.

3. It's important to r______ paper to save the trees.

4. Most people are a______ putting animals in the zoo.

5. The a______ animals should be put in cages.

观察下边漫画，回答问题：

（1）漫画中同学们心中的矛盾状态是什么原因造成的？

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（2）你有过这样的烦恼吗？你认为怎样才能解除这样的烦恼？

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We have to             our sports meeting till next Monday because of the bad weather. [ ]

A. put on

B. put off

C. put down

D. put out

减压炉出口管扩径的目的是什么？

白利糖度值不超过20%的柠檬粉