如果两数之和为20，其中一个数用字母x表示，那么这两个数的积的代数式是（ ） A

股份制是现代企业的一种资本组织形式，不能笼统地说股份制是公有还是私有。( )

今年五月，长江中下游地区发生严重的旱灾。我们在抗旱救灾的同时，更应注意确保饮用水的安全。一些村庄采取打深井的方法取用地下水，请你给村民一些正确使用地下水的建议。

(1)可用________测定地下水的酸碱度。

(2)判断地下冰是硬水还是软水，可加入________进行检验：为了降低水的硬度，村民可采用的方法是___________。

(3)为保护有限的地下水资源，给村民提出的一条节约用水的建议是_____________。

It was one of those terribly hot days in Baltimore. Needless to say, it was too hot to do anything outside. But it was also scorching in our apartment. This was 1962, and I would not live in a place with an air conditioner for another ten years. So my brother and I decided to leave the apartment to find someplace indoors. He suggested we could see a movie. It was a brilliant plan.

Movie theaters were one of the few places you could sit all day and—most important —sit in air conditioning. In those days, you could buy one ticket and sit through two movies. Then, the theater would show the same two movies again. If you wanted to, you could sit through them twice. Most people did not do that, but the manager at our theater. Mr. Bellow did not mind if you did.

That particular day, my brother and I sat through both movies twice, trying to escape the heat. We bought three bags of popcorn and three sodas each. Then, we sat and watched The Music Man followed by The Man Who Shot Liberty Valance. We’d already seen the second movie once before. It had been at the theater since January, because Mr. Bellow loved anything with John Wayne in it.

We left the theater around 8, just before the evening shows began. But we returned the next day and saw the same two movies again, twice more. And we did it the next day too. Finally, on the fourth day, the heat wave broke.

Still, to this day I can sing half the songs in The Music Man and recite half of John Wayne and Jimmy Stewart’s dialogue from The Man Who Shot Liberty Valance! Those memories are some of the few I have of the heat wave of 1962. They’re really memories of the screen, not memories of my life.

小题1:In which year did the author first live in a place with an air conditioner?

A．1952

B．1962

C．1972

D．1982小题2:What does the underlined word”It” in Paragraph 3 refer to?

A．The heat

B．The theater.

C．The Music Man

D．The Man Who Shot Liberty Valance小题3:What do we know about Mr. Bellow? 

A．He loved children very much.

B．He was a fan of John Wayne.

C．He sold air conditioners.

D．He was a movie star.小题4:Why did the author and his/her brother see the same movies several times?

A．The two movies were really wonderful.

B．They wanted to avoid the heat outside.

C．The manager of the theater was friendly.

D．They liked the popcorn and the soda at the theater.小题5:What can we learn from the last paragraph?

A．The author turned out to be a great singer.

B．The author enjoyed the heat wave of 1962.

C．The author’s life has been changed by the two movies.

D．The author considers the experience at the theater unforgettable.

生产出口包装容器的企业，必须申请检验检疫机构进行包装容器的性能检验，包装容器经检验检疫机构检验合格并取得( )的，方可用于包装危险货物。

A．出境货物检验检疫换证凭单
B．出境货物报检单
C．出境货物通关单
D．性能检验结果单

炸是物系发生（），并瞬问放出大量能量的现象。

A.缓慢变化

B.迅速变化

C.变化

D.作用