A．$40． B．$50． C．$60．——青夏教育精英家教网—

________ have the same Newly－added Low－rent Housing in 2011．
[　　]
A．	Changzhou and Yancheng
B．	Taizhou and Suqian
C．	Lianyungang and Suzhou
D．	Xuzhou and Huaian

(3)

________ economically affordable houses will be built in 2011 in Jiangsu．
[　　]
A．	60, 000
B．	50, 000
C．	40, 000
D．	30, 000

(4)

________ has the most Indemnificatory Housing in Jiangsu in 2011．
[　　]
A．	Zhenjiang
B．	Changzhou
C．	Nanjing
D．	Xuzhou

(5)

From the form, we can learn that our government is trying to ________．
[　　]
A．	build more houses for common people, especially poor people
B．	make the price of houses higher
C．	ask people to rent houses instead of buying houses
D．	build more houses for rich people

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阅读理解

In Picture 1, it tells us what happens, how much time it takes to dissolve (溶解)the sugar when tem-perature increases．In Picture 2, it's a room．The heater is working all the time．Can you get any knowledge of how the convection current (对流)is born?

根据图示信息选择最佳答案．

(1)

When the temperature of water is ________, it takes the least time for the sugar to dissolve．
[　　]
A．	50℃
B．	40℃
C．	60℃

(2)

When the wind blows, what happens?
[　　]
A．	Cool air rises．
B．	Warm air falls．
C．	Warm air rises and cool air takes the place of warm air．

(3)

Which of the following is NOT true?
[　　]
A．	From the picture, we can know air can move like liquid．
B．	When air is heated, warm air goes down and cold air rises．
C．	When air is heated, warm air goes up and cold air falls．

(4)

When the temperature of water is 40℃, ________ is needed to dissolve the sugar．
[　　]
A．	40 seconds
B．	23 seconds
C．	15 seconds

(5)

We know that ________ from Picture 1．
[　　]
A．	when the temperature of water is low, it takes the least time to dissolve the sugar．
B．	when the temperature of water is high, it takes the least time to dissolve the sugar．
C．	the temperature of water has no influence(影响)on how soon the sugar dissolves．

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