在“探究凸透镜成像规律”的过程中,小明同学观察到了如图所示的实验现象。下列光学仪

题型:选择题

问题:

在“探究凸透镜成像规律”的过程中,小明同学观察到了如图所示的实验现象。下列光学仪器的工作原理与该现象所反映的规律相同的是

[ ]

A.投影仪

B.照相机

C.放大镜

D.汽车的后视镜

考点:生活中的其他透镜(照相机,放大镜,投影仪等)
题型:选择题

阅读理解。

     Sophia is very happy these days. The 13-year-old girl from the UK has a lot of fun during her trip

in Beijing. She eats dumplings, tries Chinese calligraphy (书法), climbs the Great Wall and speaks

Chinese, all for the first time!

     She even stays with a Chinese family for a week. "Beijing is very big and beautiful. And the people

here are very nice!" She says. Sophia comes with her teachers and classmates from the UK. The students

in Shangdi Experimental Primary School of Haidian District receive them. These two schools are "Heart

to Heart" schools. There are 200 "Heart to Heart" schools in Beijing. Each of them has a partner school

in a foreign country. They meet and get to know each other.

1. How old is Sophia?

A. 15          

B. 14          

C. 13          

D. 11

2. How long did Sophia stay with a Chinese family?

A. Two days.  

B. Seven days.    

C. A year.        

D. 6 months.

3. What did Sophia think of Beijing?

A. Big.        

B. Beautiful.    

C. Exciting.      

D. A and B.

题型:选择题

合成氨工艺中,循环量的定义?

题型:选择题

单词填空

1. He is their _____(收养的)son, but they love him very much.

2. Swimming is _____(禁止;取缔) in this lake.

3. We can be _____(灵活的)about your starting date.

4. There are various reasons why people write _____(诗;诗歌).

5. You will soon get _____(习惯于) to the climate here.

6. Please don't put those glass bottles on that old table, because it is not _____(平稳的).

7. I'm not sure whether they can _____(交换;交流) their gifts.

8. He _____(试图;企图) to pass the driving test, but he had no luck.

9. Jack is late again. It is _____(典型的;有代表性的 ) of him to keep others waiting.

10. Each child is unique and teachers should encourage each one to realize their _____(有潜力的).

题型:选择题

产生痰的部位是

A.鼻

B.咽

C.肺

D.气管和支气管

题型:选择题

下列成分难溶于水的是()

A.鞣质

B.无机盐

C.糖类

D.树脂

E.苷

更多题库