搜题请搜索小程序“爱下问搜题”
问题 操作题

将△ABC沿AD平移，A点平移到点D，画出平移后的△DEF。

答案

解：连接AD，过B、C分别做AD的平行线，

并且在平行线上截取BE=CF=AD，

连接ED，EF，DF，

得到的△DEF即为平移后的△DEF。如图所示：

填空题

根据句意和首字母提示填空，完成下列句子。

1. —How o_________ does your mother shop?

    —Twice a week.

2. I also like English. But math is his f_________ subject.

3. Some children often surf the I_________ with the help of their parents.

4. We u________ play soccer on weekdays.

5. A________ for him, he is nothing but a dog. Don't be angry with him.

6. Do you know the r_________ of the football match?

7. To go to bed early and to get up early is a healthy l_________.

8. Her uncle n_________ watches football match. He doesn't like football at all.

9. —What is your favorite TV p_________?

    —Sports news.

10. —How many t__________ did you go to Beijing?

     —Only once.

查看答案
单项选择题

培养基的保存，叙述错误的是（）

A.制备好的培养基应保存于低温环境中

B.保存培养基应避免强光照射

C.不同性质的培养基，保存期限不同

D.放在塑料袋中密封，可延长保存时间

E.温度越低，保存时间越长
查看答案