问题 读图填空题

某同学设计了两组实验装置,用来探究种子萌发所需要的环境条件(如下图)。他所使用的材料用具有烧杯、吸水纸、标签、清水、绿豆种子等。

(1)根据两组实验装置填写下表。

探究的因素
空气
温度
处理方式
利用实验一的A与C装置进行对比处理
 
 
预期效果
 

(2)做实验二时,为什么要设置A装置?__________________________。(3)做实验一时,如果C装置中的种子没有萌发,请分析原因(至少写出两点)。 ①____________________; ②___________________。

答案

(1)

探究的因素 空气 温度
处理方式利用实验一的A与C装置进行对比处理利用实验一的B与C装置进行对比处理利用实验二的A与B装置进行对比处理
预期效果C萌发,而A不萌发C萌发,而B不萌发A萌发,而B不萌发

(2)作为对照。如果A萌发了,一方面证明种子本身是活的,另一方面说明种子萌发需要适宜的温度。(3)①种子是死种子或种子的结构被破坏 ②环境温度不适宜

阅读理解

It’s hard not to feel cheated and over-charged when you receive unexpected roaming (漫游) charges while traveling abroad—whether they come from making phone calls or checking e-mails.

Jeff Gardner received an $ 11,000 bill from Verizon after spending four days in Jamaica. Before the trip, Mr. Gardner, who runs a fly-fishing business in Grayling, Michigan, said he called Verizon to find out what it would cost to use his cellphone for calls and his wireless card to check e-mails while in Jamaica. He said he was told that calls would be about $ 2 a minute and that there would be no extra charges for data as he was on an unlimited plan. The latter part turned out to be wrong.

“I don’t mind paying a fair amount for fair service, but $11,000 for four days is ridiculous,” said Mr. Gardner, who used his phone carefully and economically on the trip. He also tried to check and send e-mails using his wireless card, but quickly gave up after the e-mails didn’t go through. Still, his Verizon bill said more than 500,000 kilobytes (千字节) of data was delivered while he was in Jamaica, an amount Mr. Gardner said is 100 times what he normally uses in a month.

As travelers increasingly use smart phones abroad in the same way they do at home—to check e-mails, update Facebook and Twitter and pull up online maps—many are facing costly roaming fees, which providers charge when customers use their phones outside their service area. In fact, roaming charges have gotten so out of hand that the Federal Communications Commission has proposed a plan that would require wireless companies to send their customers a voice or text message when they are approaching their plan’s limit, when they have reached that limit and when they are starting to result in roaming fees.

小题1:Why did Jeff Gardner call Verizon before his trip to Jamaica?

A.To hand over his business.

B.To check his cellphone bill

C.To find out information about Jamaica.

D.To find out information about roaming charges.小题2:What does the underlined sentence in Paragraph 2 mean?

A.Extra charges were made for Jeff Gardner’s data delivery.

B.Jeff Gardner’s calls were charged over $2 per minute.

C.Jeff Gardner’s plan turned out to be limited.

D.Jeff Gardner had difficulty delivering data abroad.小题3:During the trip, Jeff Gardner______.

A.was careless with phone use

B.delivered no more data than at home

C.received quite poor e-mail services

D.frequently used his wireless card to send e-mails小题4:What should wireless companies do according to the Federal Communications Commission?

A.Make customers know when they’re outside their service area.

B.Get customers informed when they’re near the limit of their plan.

C.Stop serving customers when they’ve reached their plan’s limit.

D.Limit some services to reduce the amount of roaming charges abroad.

单项选择题 B型题