下图是 A、B、C三种物质的溶解度曲线,回答下列问题: (1)________

题型:填空题

问题:

下图是 A、B、C三种物质的溶解度曲线,回答下列问题:

(1)________℃时,A、C的溶解度相等.

(2)如果A物质中混有少量B物质,可用            的方法得到较纯的A物质。

(3)在t2℃时,向50克的水中加入25克A物质,充分溶解后所得的溶液为_____________(填“饱和溶液”

或“不饱和溶液”)。

考点:固体溶解度气体溶解度
题型:填空题

There is a special kind of hotel in Quebec, Canada. It has a bar, a church, a shop and a small theater. These things are not unusual. But this hotel is only open from January till March every year. Why? Because it is made of ice and snow! When the weather gets warm, the hotel melts(融化) and closes. Every winter, the hotel owners build the hotel again.

Everything in the Ice Hotel is made of ice and snow. All the furniture, such as the tables and chairs, is made of ice. Even the beds are made of ice! So people use special sleeping bags on the ice beds. Inside the ice hotel, the temperature is about 27°F(-3°C)

When people sleep, the sleeping bags keep them warm. In the morning, they can have a hot breakfast. After breakfast, people can enjoy winter activities. They can go skiing or ice fishing. Or they can go skating in the dining room. At the end of the day, people can relax at the bar. They can have drinks in glasses made of ice.

Many people enjoy the Ice Hotel every year. But they can only enjoy it for a short time before it melts again.

小题1: Every year, this hotel is only open for        

A.four weeks

B.about three months

C.two seasons

D.about a year小题2:People can go      in the dining room after breakfast.

A.skiing.

B.skating.

C.fishing

D.swimming小题3: What's the best title of this passage?

A. An Unusual Hotel  B. A Warm Hotel  C. A Common Hotel   D An Old Hotel

题型:填空题
15×
2
3
表示______,
2
3
×15表示______.
题型:填空题

下列战役发生在甲午中日战争中的有 [ ]

A、虎门战役

B、黄海战役

C、辽东半岛战役

D、威海卫战役

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麻醉医师如何正确实施术后镇痛治疗?

题型:填空题

联言命题的反驳方式有几种?()

A、4.0

B、3.0

C、2.0

D、1.0

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