题干

根据句意和提示写出单词,完成句子。
Guilin is a very beautiful city in the s____ of China. How I want to go on a trip there!
What’s the p____ of China? It’s about 1.4 billion. China has the most people in the world.
Never forget your own country w____ you go in the future.
____  with the past, our life today is much better.
 —I don’t know what to do w____ my computer. It doesn’t work well again!—Why not ask Mr Jiang for help? He is a computer engineer.
After a terrible earthquake, food, water and ____ (帐篷) are needed most.
For thousands of years, the Great Wall has been the ____ (骄傲)of all the Chinese people.
You don’t like eating snacks and I don’t like eating snacks, ____ (也).
The special boots can prevent astronauts from____ (漂浮) away into space.
On the moon we could____ (容易)jump much higher than on the earth.
Tian’anmen Square is the biggest square in the world and is often____ (fill)with tourists.
Neil Armstrong got his student  ____ (pilot) licence at the age of 16.
 Last year our school held the 12th School Art and Culture Festival and it was a big____ (success)
Thomas Edison was one of the greatest____ (invent) in the world.
He made up his mind to explore places that were____ (know) to humans today.

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答案(点此获取答案解析)

south,population,wherever,Compared,with,tents,pride,either,floating,easily,filled,pilot's,success,inventors,unknown

同类题2

回答下列有关光合作用的问题.

Ⅰ、图为植物光合作用过程示意简图,其中英文字母与甲、乙分别表示物质成分,数字表示反应过程.

(1)图中,膜的上方为叶绿体____结构部分.

(2)PSⅠ、PSⅡ分别为光合色素与蛋白质的复合系统,其中含有大量叶绿素A的复合系统是____ ,判断原因是____ 

(3)当某种环境因素X减弱时,B浓度明显下降,从而导致过程②催化酶的活性下降,但同时大多数酶的活性并未受影响;当减低环境因素Y时,过程②的酶与绝大多数酶的活性均降低.因此,可以推断影响过程②催化酶的因素X、Y分别可能是____

(4)增大CO2浓度有利于提高光合作用效率,但当CO2浓度提高到一定程度后,光合作用产物并不会再增加,这是因为____ 

(请写出两点).

Ⅱ、气孔是CO2等气体进出叶片的通道,气孔导度表示单位时间内进入叶片表面单位面积的CO2的量,其单位是mmolCO2•m2•s1,能反映气孔张开的程度.

(4)研究小组探究不同浓度的镉对小白菜光合作用的影响,实验结果见表.

镉浓度

(mg•L1

气孔导度

(mmolCO2•m2•s1

胞间CO2浓度

(μL•m2•s1

净光合速率

(μmolCO2•m2•s1

0

154.75

256.50

11.05

0.01

133.50

264.50

9.07

X

141.50

236.75

12.02

1

121.00

277.00

8.37

10

93.75

355.00

3.52

据表分析,X应为____ ,理由是____;高剂量(≥1mg•L1)镉会使气孔导度____,而胞间CO2浓度却增大,其主要原因是____ ,以致合成的C3减少.

(5)表是植物A和植物B在一天中气孔导度的变化.据表分析可知,一天中植物A和植物B吸收CO2的差异主要是____ ;沙漠植物的气孔导度变化更接近于植物____ .

时刻

0:00

3:00

6:00

9:00

12:00

15:00

18:00

21:00

24:00

A气孔导度

38

35

30

7

2

8

15

25

38

B气孔导度

1

1

20

38

30

35

20

1

1