问题 解答题

为了探究光的强度与光合作用强弱的关系,某同学做了如下实验:在4支盛水的试管中分别放入同样的金鱼藻,并将试管放在离白炽灯的不同距离处,观察试管中产生气泡的数目,收集到如下数据.

试管与灯的距离(cm)每分钟产生的气泡数(个)
580
1070
1555
2030
请分析:

(1)从上表可得到哪些信息?(写两条)______.

(2)由此实验可得出的结论.______.

答案

(1)光合作用受光照强度的影响;试管与灯的距离越来越大,光照强度越来越低,光合作用产生的氧气越少,因此试管中每分钟产生的气泡数越来越少.

(2)试管与灯的距离越近,光照强度越大,产生的气泡越多,光合作用越强.本实验的惟一变量是光源与植物的距离.也就是光照强度的不同.通过观察释放的气泡(氧气)的多少,看光照强度对光合作用的影响是怎么样的.

结论是光照越强,绿色植物的光合作用越强.

故答案为:(1)①植物和光源的距离与植物产生的气泡数成反比;②植物离光源越近,产生的气泡越多;③植物离光源越远,产生的气泡越少.(只需求写出2条,得2分)

(2)光照强度越大,光合作用越强(或产生的氧气越多等)

阅读理解

Long queues at cinemas buying hot tickets for blockbusters(巨片) will become rare as Beijing residents will be able to order film tickets via cell phone networks in a month.

Film ticket circulation service on cell phone, also called the “Green channel of film tickets ordering”, is aiming at lowing the cost of ticket circulation and easing the ticket distribution pressure on such popular film-watching days as summer and winter vacations or Valentine’s Day.

“People log onto the net through cell phones, then choose cinema seats, watch trailers, browse information for new films and read cinema introductions,” said Guan Zheng, the publicity chief of Xingmei Digital Media Company Ltd., the service provider.

“Film fans can enjoy various discount prices if they order tickets via cell phones,” Guan said.

Meanwhile, the cell phone ticket circulation platform provides subscribers general mobile phone services like jokes, videos, flashes, phone ring downloads and games.

The service is about to be put into trial at the Beijing-based Xingmei International Cinema for a month before being putting into use at other cinema chains both in and outside Beijing, as the service is going to be improved through gradual expansion, said Guan.

China’s film industry that is being restored has seen more and more enthusiastic moviegoers. Up to the end of 2009, China has had more than 5,000 specialized cinemas, among which there are 2,243 modern cinemas with 3, 668 silver screens and 56 cinema chains.

Currently, many people buy film tickets on the Internet or by phoning the cinema’s ticket office or simply queuing at the cinema gate. More people want to buy tickets on popular days like May Day holiday, National Day holiday or Valentine’s Day. Yet the inefficient ticket circulation system contributes the most to the failure.

小题1:What can we learn from the passage?

A.The price of the ticket ordered via cell phone will be lower.

B.Ordering tickets through the net can get good seats.

C.Few people would like to watch films on the net.

D.More and more people like to watch films on the net.小题2:What does the underlined part “watch trailers” in the third paragraph mean?

A.You can watch films after downloading them.

B.You can watch commercial ads free of charge.

C.You can watch short ads for new movies.

D.You can watch films on the net at home.小题3:What does the passage imply?

A.The service is only intended to put into use at the cinema in Beijing for a month.

B.China’s film industry saw the decreasing number of moviegoers by the end of 2009.[

C.The traditional ticket selling system makes it hard to get film tickets on popular days.

D.The green channel of tickets ordering is aiming at provides general mobile phone services..小题4:The best title for the passage would probably be ________.

A.Rare Beijingers to watch films on the net

B.Few Beijingers to buy film tickets in line

C.Beijingers to watch films via cell phone

D.Beijingers to order film tickets via cell phone

单项选择题