把6米长的绳子平均分成6段,每段长( )米. A.15 B.1 C.25 D.5

题型:选择题

问题:

把6米长的绳子平均分成6段,每段长(  )米.
A.
1
5
B.1C.25D.5
考点:分数的认识及意义
题型:选择题

袁隆平教授利用普通水稻及一种野生稻,培育出高产而优质的水稻新品种。这种育种方法是(  )

A.人工选择培育

B.诱导基因突变

C.杂交育种

D.转基因育种

题型:选择题

尿结石的形成部位是

A.肾
B.膀胱
C.肾、输尿管、膀胱及 * *
D.肾和膀胱
E.以上都不是

题型:选择题

阅读理解 

     Have you ever seen people dance? Some dances are fast and others are slow. People's feet always

move when they dance. They keep on moving until the music stops.

     People have enjoyed dancing for a very long time.This story is of a different kind of dance. It is a

dance without people or music. Yet this dance is one of the oldest in the world. It is the dance of bees.

     If you have ever watched bees, you know that they are very clever. They also work hard looking for

food and bringing it back to their home.

     The home of the bees is called a beehive. Here hundreds even thousands of bees live. They work day

and night building small walls of wax. There they make their honey. This is the same honey that we eat.

     Where does the honey come from? Bees live on food from flowers. Have you seen bees flying around a flower garden? When a bee rests on a flower, it tries to go to the centre of it. There it takes in as much

food as its body can hold. Then it flies to take the food back to the hive.

     At the hive, bees change this flower food into honey. Then they fly away for more food.

     How do the bees know where to find the best food in the sweetest flowers? One bee acts as a guide.When it discovers good flowers, it flies back to the hive and tells the others. It does this by dancing for

them. The bee dances on one side. This tells the otherbees which way to go to find the flowers. But that is

not all. The bee dances for some time. And the length of its dance tells the other bees how far they must

fly to reach the flowers. When the bees see the dance, they know where the flowers are.

     They fly away and return with more food for the hive.

     Sometimes we hear the music of the bees as they fly around, but few people have ever seen them

dance. Yet without that dance we might never have sweet honey to eat.

1. The writer believes that       .

A. people dance better than bees

B. people learned dance from bees

C. bees dance more often than people

D. bees don't like music

2. From this passage we know that the dance of bees means      .

A. they are good at dance

B. they want to show their beauty

C. they communicate with each other

D. they have nothing to do

3. Which of the following is TRUE?

A. People get honey from flowers directly.

B. People draw honey from bees' bodies.

C. People produce honey in a secret place.

D. People get honey from bees indirectly.

4. What character do bees have?

A. Dance loving.

B. Hardworking.

C. Music loving.

D. Active.

5. If a bee wants to get some information about the distance of food, he may watch closely at       of the

other bees' dance.

A. the side

B. the length

C. the place

D. the time

题型:选择题

并殖吸虫的易患对象是()

A.家禽

B.人和某些家畜、野兽

C.牛、羊

D.啮齿动物

E.人

题型:选择题

某人如果于2008年7月1购买A公司2004年1月1日发行的债券票面额为1000元,票面利率为8%,每年付息一次的5年期债券,市场利率为10%,当债券的市价低于( )元时可投资。

A.1080

B.1000

C.981.81

D.1029.75

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