搜题请搜索小程序“爱下问搜题”
问题 解答题
生物兴趣小组采集植物标本和昆虫标本共60件．植物标本的件数是昆虫标本的
3
2
，两种标本各有多少件？（用方程解）
答案

设昆虫标本有x件，则植物标本就有

3
2
x件，根据题意可得方程：

x+

3
2
x=60，

5
2
x=60，

x=24，

60-24=36（件），

答：昆虫标本有24件，植物标本有36件．

阅读理解



A Solar-powered Plane---Lowcarbon
Earlier this month, a solar-powered (太阳能动力的)plane called Lowcarbon took off to the sky for the first time. It has passed an important test on the way to travel around the world.
Lowcarbon took off from an airport in Switzerland(瑞士)at 45 km an hour. It slowly rose into the sky.
“There has never been an airplane so big, so light, using so little energy,” said Bertrand Piccard, a leader of the project.
During the 90-minute flight, Lowcarbon did several turns. It climbs nearly 1.6 km above the countryside.
Engineers plan to test a night flight in July. Then they will use the results of the tests to build a second plane. They plan to travel around the world in that plane in 2012. “We want to fly it day and night with no fuel,” Piccard said.
Piccard and pilot Andre Borschberg will take Lowcarbon around the world .They will make a few stops to change places and rest after a long time in the air----and to show off their aircraft.
Lowcarbon flies at 70 kph on average(平均). That is faster than a bike and slower than a car. The pilots will keep it in the air for up to five days at a time.
We Are One---“Expo Through My Eyes”
Sharing offers you more happiness. To celebrate the 2010 Shanghai World Expo, China Daily invites you to share what you’ve seen, heard and experienced at the 6-month international event or Expo-related stories in English. Whether you are an Expo volunteer, a reporter, or a tourist , we’d like you to share with us your Expo experience, as seen through your eyes. So if you would liketo contribute(投稿)，please join us today in sharing the joy!
Topic: 2010 Shanghai World Expo
Language: English only
Length: No more than 1,000 words-
Content: Stories with photos are necessary.
Duration: May 1,2010---October 31,2010
Email-box: expo@chinadaily.com.cn
Reward: In addition to the satisfaction of supporting our work,
---your stories will be published on China Daily’s website;
---you will go in a lucky draw for a prize.
小题1:Which of the following information about the plane Lowcarbon is NOT true?
A．It can fly at 70 km an hour.B．It is solar –powered.
C．It has passed a night-flight test.D．It is slower than a car.
小题2:Lowcarbon is a special plane because________________.
A．it’s made in SwitzerllandB．it has travelled around the world
C．it can do turns in the skyD．it’s big and light, but uses little enegy
小题3:The purpose of the second article is to________________.
A．encourage us to visit Shanghai ExpoB．ask us to be volunteers for Shanghai Expo
C．invite us to write stories about Shanghai ExpoD．tell us to get the lucky prize of Shanghai Expo
小题4:Your stories about the 2010 Shanghai Expo for China Daily___________.
A．can be in ChineseB．don’t need to have photos
C．must be given by postD．should be handed in by e-mail
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单项选择题

口腔癌预防的含义不包括（）

A.预防发生

B.预防对邻近组织的损害

C.预防转移

D.预防因口腔癌丧失生命

E.少吃糖多吃含矿物质的食品
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