当溶质在气相中分压（）该组分在溶液中蒸汽分压时，溶质进入液相，被溶液吸收。A.小于

They wanted to have _________ rest.[ ]

A. a little minute's                       

B. minute                      

C. a few minutes'                        

D. two minute

分析回答下列有关光合作用和呼吸作用问题：下图表示在光照条件下某植物叶肉细胞内发生的生理过程，请据图回答： 

(1)图中D表示_______；G表示_______。②过程所示，氧气产生后到释放到叶肉细胞外需要经过的生物膜层数为______。

某学校生物兴趣小组用伊乐藻进行光合作用的实验。他们将一枝伊乐藻浸在加有适宜培养液的大试管中(室温20℃)，在光照条件下可观察到枝条放出气泡。他们以太阳灯(冷光源)作为光源，移动太阳灯(冷光源)使之与大试管的距离不同，结果如图2中曲线1所示，其中伊乐藻的光合速率用单位时间O₂释放量表示。(备注：冷光源能排除温度对实验结果的干扰。)

(2)该小组的实验研究的是_______对光合速率的影响。试管中收集的O₂量代表_______(填“总”或“净”)光合作用强度。

(3)该小组在室温10℃和30℃时分别进行了实验，结果如曲线2和曲线3，则BC段的限制因素主要是_______。C点时细胞中能产生[H]的细胞器是________。

(4)在B点时，曲线1中光合作用的实际速率________(大于、等于或小于)曲线2中光合作用的实际速率。

阅读理解。

     Houston, Texas (June 8, 2002)-In 2004, the National Aeronautics and Space Administration (NASA)

will send two robots (机器人) to separate places of Mars to seek out past or present signs of water. It is

all exciting idea to send two robots driving over very different places of Mars at the same time, to be able

to see what is on the other side of the hill.

     Last month, NASA announced it was sending one robot to Mars, but after two weeks, it decided there

was enough money for two.

     The robots will be sent up within two weeks of each other in May and June of 2003 from Kennedy

Space Center. If all goes well, the two spacecraft (宇宙飞船) will touch down on Mars,after a

seven-and-a-half-month space flight,on January 2 and 2O, 2OO4 The robots, each weighing 150 kilograms,

can cover 100 meters per day. They are designed to be able to examine the mineral content of the soil, and

their special camera will take pictures of the lands and hills Although they will be under control from Earth,

the robot, are able to move more freely compared to those sent up before them.

     The actual landing points have not been determined yet, but the scientists say it will be in areas where

they hope to find water.

1. According to the news report, scientists plan to send robots up to Mars to ______.

A. find out whether there is water on Mars

B. see if robots can find minerals there

C. test how fast robots can drive there

D. prove that robots can work on Mars

2. How long in between will the two robots be sent to Mars?

A. 1 year

B. 7.5 months.

C. 2 months.

D. 2 weeks.

3. One of the important jobs for the robots on Mars is to ______.

A. study the soil

B. walk everywhere

C. test the new camera

D. find a suitable landing point

4. We can infer from the last sentence that scientists ______.

A. have changed the landing points many times

B. hope to land the robots on the surface of water

C. are still working on the plan

D. know where they can find water

普通混凝土中直径大于（）mm的钢筋，宜采用焊接。

A.25

B.28

C.22

三级火险预警挂什么颜色旗。（）