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C Scientists used to explore on the surface of the ocean. Now they are exploring below the surface, too. They want to know about ocean water and the plant and animal life deep in the ocean. In 1934 the scientist William Beebe dived 3,000 feet below the surface in a hollow steel ball. In 1935 August Piccard dived 10, 330 feet. In 1960 his son Jean dived to a depth of 35,800 feet. All these early dives were deep. But the divers could not stay down for very long. They had to come back up to the surface after a few seconds. Scientists needed to stay down longer to study life below the surface. Gradually they succeeded. Cousteau, a Frenchman, was able to keep men down to a depth of 36 feet for one month and to a depth of 90 feet for a week. Now scientists are developing even better equipment. With this new equipment, men can stay below the surface for days or even weeks. In 1962 Cousteau set up a research station 35 feet below the surface. Then in 1964 he set up another station on the ocean floor of the Red Sea. This was the first undersea station to operate without help from the surface. Many countries are now studying undersea living things. The former Soviet Union had an undersea laboratory in the Crimean Sea. The United States has a laboratory 50 feet down on the ocean floor off the Virgin Islands. In 1970 five men lived there for two weeks. Then a team of five women scientists stayed in the laboratory. Next came other teams of men. All were there to explore the ocean depths and to make plans for the use of its resources. Scientists hope to find enough mineral, vegetable, and animal wealth there to provide food for the entire world. 64. In order to _____, scientists are exploring below the surface of the ocean. A. know about the ocean water deep in the ocean B. know about the plant and animal life deep in the ocean C. stay down longer to study life of the plant and animal below the surface D. both A and B 65. Who set up the first undersea station? A. A Frenchman                         B. An American C. A Russian                              D. The passage made no mention 66. Which of the following is true according to the passage? A. Nobody can stay below the surface of the ocean. B. The early divers could not stay below the surface of the ocean for very long. C. The purpose of setting up the undersea laboratories is to make plans for the use of the resources in the ocean. D. Up to now only five women scientists have stayed in the undersea laboratory.
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【简答题】每一个原子轨道要由 _ _ 个 量子数 规定,它们的符号分别是 __ __ ; 表征电子自旋方向的量子数共有 ___ 个数值,具体数值为 __ ___
【单选题】百分表的精度等级为:
A.
0.01mm
B.
0.02mm
C.
0.05mm
【多选题】生态旅游环境容量调控的基本方法包括()
A.
扩大设施规模和调整设施结构
B.
加强环境要素的管理
C.
利用时间差异进行分流
D.
充分利用游客管理手段
【单选题】百分表的精度等级为
A.
A)0.01mm
B.
B)0.02mm
C.
c)0.05mm;
【简答题】每一个原子轨道要由 ______ 个量子数规定;表征电子自旋方向的量子数共有 ______ 个数值。 (填阿拉伯数字)
【单选题】百分表的精度等级为
A.
0.01mm
B.
0.02mm
C.
0.05mm
【判断题】主导能见度是指观测到的达到或超过四周一半或机场地面一半都能达到的最大水平能见距离。这些区域必须是连续的。
A.
正确
B.
错误
【简答题】每一个原子轨道要由____个量子数规定;表征电子自旋方向的量子数共有____个数值。(填阿拉伯数字)
【多选题】旅游管理的基本方法包括
A.
经济方法
B.
法规方法
C.
道德方法
D.
教育方法
E.
行政方法
【单选题】百分表的精度等级为
A.
0.01
B.
0.02
C.
0.03
D.
0.05
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