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Tom and Fred are talking about the year 2020．"What will our world be like in the year 2020?""I don't know."says Fred．"What do you think?""Well, no one knows, but It's interesting to guess.""In the year 2020 everyone will carry a pocket computer. The computer will give people the answers to all their problems. We shall all have telephones in our pockets, too, and we'll be able to talk to our friends all over the world. Perhaps we'll be able to see them at the same time.""A lot of people will live and work under the sea. Perhaps there will be big towns, factories and farms under the sea, too.""Machines will do most of the work, and so people will have more holidays, perhaps they'll work only two or three days a week. They'll be able to fly to the moon by spaceship and spend their holidays there.""I'm looking forward(期待) to the year 2020. I hope to go to the moon!""And I hope I'll be able to live under the sea."says Fred."Won't that be very interesting? Just like a fish!"
【小題1】Tom and Fred talked about          ．

A．their school life

B．some interesting news

C．their life in the past

D．their life in the future

【小題2】Machines will          ．

A．do most of the work instead of people

B．do some of the work instead of people

C．do as much work as people

D．do as 1ittle work as people

【小題3】From their talk, we know that          ．

A．only Fred hopes to fly to the moon

B．both of them hope to fly to the moon

C．one of them hopes to fly to the moon

D．neither of them hopes to fly to the moon

【小題4】Fred said          ．

A．he liked fish very much

B．he would like to live under the sea like a fish

C．he would go fishing under the sea

D．he would spend a few days on the moon

【小題5】Which of the following statements is Not mentioned?

A．People will be able to fly to the moon in a spaceship．

B．People will have more holidays．

C．Many people will live and work under the sea．

D．All the factories and farms will be built under the sea．

我們每天都和化學(xué)變化打交道，下列敘述不是化學(xué)變化的是

A．人吃進(jìn)的食物逐漸被消化	B．人體的呼吸作用
C．使用煤氣作燃料燒飯做菜	D．水在冰箱里結(jié)成冰

下列四個短語，其原意一定包含化學(xué)變化的是

A．花香四溢

B．海市蜃樓

C．百煉成鋼

D．木已成舟

下列四個短語，其原意一定包含化學(xué)變化的是

A．花香四溢

B．海市蜃樓

C．百煉成鋼

D．木已成舟

下列四個短語，其原意一定包含化學(xué)變化的是

A．花香四溢

B．海市蜃樓

C．百煉成鋼

D．木已成舟

中國共產(chǎn)黨自建黨以來，據(jù)統(tǒng)計先后召開會議八百余次。這些會議整體反映了中國共產(chǎn)黨八十多年來艱辛而又光輝的歷程。其中七屆二中全會、八大、十一屆三中全會在我國社會主義發(fā)展史上具有劃時代的意義。
請回答：   
(1)分別指出上述三次會議在社會主義經(jīng)濟(jì)建設(shè)方面具有延續(xù)性的決策。作出這些決策的有利國際因素是什么?(8分)
(2)上述三次會議在指導(dǎo)黨的建設(shè)方面先后提出了哪些方針?(3分)   
(3)在開創(chuàng)社會主義事業(yè)新局面的歷程中，三次會議具有怎樣的歷史地位?(3分)

下列物質(zhì)屬于純凈物的是(    )

A．食醋

B．白酒

C．糖水

D．蒸餾水

下列物質(zhì)屬于純凈物的是(    )

A．食醋

B．白酒

C．糖水

D．蒸餾水

計算：
（1）        
（2）

解方程：
（1）                
（2）
(3)關(guān)于的方程與方程同解,求