透明带破裂发生于（） A.原肠胚期 B.卵裂时 C.囊胚期 D.桑椹胚期

阅读下面短文，根据短文内容完成下列各题。

What will the home of the future look like? A team of architects (建造师) in Hong Kong say that city homes will be tiny, as populations continue to grow and space becomes more expensive. They have designed “space flats”. 83它们只有30 平米大。These flats have three small rooms, a living room, a bathroom and a bedroom, as well as a balcony (阳台),but everything is carefully planned to make good use of the limited space.

The living room is the main room of the flat. It can be used as an office, a kitchen or even a second bedroom. There is a sofa that can be changed into a bed. The dining table can be changed into a computer desk. And, if not needed, both the sofa-bed and the table can be folded away and stored into a small apace in the wall. There is a flat-screen TV, which can also serve as a computer monitor. In one corner of the room, a small cooker, a microwave oven and a miniature refrigerator are hidden out of sight.

The other rooms are small but useful. The bathroom contains a toilet and a shower. The double bed in the bedroom can also be a sofa, if necessary, The balcony has enough room for two people to sit and enjoy the view from the block of flats. All the rooms have high ceiling to provide as much storage space as possible, while the flat has large windows to let in plenty of sunlight.

“Space flats “are now being tested in a building in Hong Kong. “It’s wonderful,” said one resident(居民) “84. The flat is so well designed that you feel that there is plenty of space”

小题1:Why do the architects think that “Space flats “will be important in the future?

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小题2:How many rooms can a “space flat ” have in all ?

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小题3:将划线句子译成英语。

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小题4:将划线句子译成汉语。

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小题5:请给短文拟一个合适的题目。

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（8分）下图为细菌的结构示意图，请认真看图并回答。

(1)一个细菌也是一个细胞，与真菌的细胞相比，细菌的结构中没有           。与植物细胞相比，相同之处是都有[2]细胞壁、[3] 细胞膜和[4]     ，但没有       ，所以多数细菌的营养方式是异养型。

(2)图1中[ 1 ]是         ，对细菌有一定的保护作用；能够使细菌在水中游动是[6 ]             。

(3)大多数细菌在生态系统中属于         者，参与自然界的             循环。细菌对人类也有有益的一面，试举出一个例子：                   。

2012年2月16日，央视《焦点访谈》报道了苏泊尔四大类产品锰含量超出国标近4倍，81个规格炊具被检测为不合格。这里的“锰”是指

A．单质

B．元素

C．离子

D．分子

纸浆制的滤块,滤板及滤片

下列哪款直升机是我国直升机行业从专利生产、测绘仿制走向自行设计的第一种直升机？（）

A.直-5

B.直-8

C.直-9

D.直-11