阅读下面短文，回答下列四道题*德国青年失业者的比例在西方国家中最低，其原因在于()

根据下表中实验内容回答问题：

(1)在上述实验过程中，必须借助显微镜才能完成的是_____________(序号)，实验中需要水浴加热的有__________(序号)。

(2)在上述实验中，常用到酒精的实验有②⑤⑥⑦，其中酒精所起的作用分别是____、_____、_____、______。

(3)由于实验材料用品或试剂所限，有时候需要设法替代。下列各项处理中正确的是___________。

A．做⑦实验时，可用蒜叶代替洋葱根尖

B．做④实验时，可用鸡血红细胞代替紫色洋葱表皮细胞

C．做⑤实验时，可用干净的细沙代替二氧化硅

D．做②实验时，可用龙胆紫代替苏丹Ⅲ染液

工业类建设项目的组成和划分，按照工程的性质和作用，可以分为( )。

A．主要生产系统

B．附属和辅助生产系统

C．行政办公和生活设施系统

D．混凝土结构系统

E．主体结构系统

阅读理解。

      The journey two divers made some time ago to the deepest point on the earth makes us realize how

much of the world still remains to be studied. The two men went down seven miles to the bottom of the

Pacific Ocean inside a small steel ball to find out if there are any ocean currents (水流) or signs of life.

      It was necessary to set out early, so that the ball would come to the surface in daylight, and be easily

found by the mother ship which would be waiting for it. The divers began preparations early in the morning

and soon afterwards, when all was ready, the steel ball disappeared under the surface of the water.

      The divers felt as if they were going down steps as they passed through warm and cold layers (层) of

water. In time the temperature dropped to the freezing point. They kept in touch with the mother ship by

telephone telling how they felt. Then, at a depth of 3,000 feet, the telephone stopped working and they were

quite cut off from the outside world. All went well until some four hours later at 30,000 feet, the men were

frightened by a loud, cracking noise. Even the smallest hole in the ball would have meant instant death. Luckily,

though, it was only one of the outer windows that had broken. Soon afterwards, the ball touched the soft

ocean floor raising a big cloud of "dust" made up of small dead sea creatures. Here, powerful lights lit up the

dark water and the men were surprised to see fish swimming just above them quite untroubled by the great

water pressure. But they did not dare to leave the lights on for long, as the heat from them made the water

boil. Quite unexpectedly, the telephone began working again and the faint but clear voices of the divers were

heard on the mother ship seven miles away. After a stay of thirty minutes the men began their journey up,

arriving three hours later, cold and wet through, but none was worse for their experience.

1. The purpose of the divers' journey to the deepest point on the earth was to find _____.[ ]

A. if there are water currents, and life in the great depths

B. if people can stand the severe cold in the great depths

C. if there are steps in the great depths

D. if the telephone works well in the great depths

2. The divers set out early in the morning so that _____. [ ]

A. they could return to the surface during the day

B. they could see at the bottom of the ocean

C. they could avoid the cold at night

D. they could stay long at the bottom

3. As the divers went down to the ocean floor, the telephone _____. [ ]

A. kept working all the time

B. stopped working at a depth of 3,000 feet and began working again after they reached the bottom

C. stopped working at a depth of 3,000 feet and began working again at 30,000 feet

D. stopped working at a depth of 3,000 feet and began working again when they returned to the same depth

4. On the ocean floor, the divers found that _____. [ ]

A. there was no life but some small dead sea creatures

B. fish were swimming as freely as they do near the surface

C. fish were not swimming freely in the dark water

D. fish were not swimming freely under the high water pressure

寒邪伤入肌表，郁遏卫阳者，称______；而寒邪直中于里，伤及脏腑阳气者为______。

家里使用的燃气灶具和热水器按照国家相关规定应该报废的年限是（）年

A.2年

B.4年

C.8年