我国生活饮用水水质标准规定，水中浑浊度的限值为（）。 A.不超过15度 B.不超过5

Zinc(锌) is one of about 20 elements necessary for good health. It is present in the body in a very small amount but makes it possible for important chemical actions to be carried out in cells. Scientists are just beginning to discover how zinc and other elements work.

Researchers first studied zinc as a way to speed recovery. Dr. Waltor Powys formerly with the United States Air Force noted that the laboratory animals recovered faster when some matters were added to their food. One of these matters was zinc. Dr. Powys later tested the zinc treatment on an American airman recovering from medical operations. The airman who received zinc sulphate(硫酸盐) recovered in half of the usual time. Other doctors studied persons who had a number of strange disorders. The doctors learned that all of these problems were caused by lack of zinc in the body. They treated these disorders successfully by giving the patients zinc sulphate.

The amount of zinc in the body can be found by examining blood and hair. A lack of this important element is not uncommon among people in both industrial and developing countries. Zinc is found in most high protein(蛋白质) foods such as meat, milk, fish and eggs. It is also found in whole grains. But many people do not eat enough of these food. Food markets should add these elements so that more people could get needed amount of these necessary matters.

小题1:Which of the following statements is true?

A．Scientists found how zinc works a long time ago.

B．People need a large amount of zinc to be healthy.

C．Zinc allows important chemical actions to take place in cells.

D．Zinc must be used in the course of medical operation.小题2: One of the results from the study of zinc is that _______.

A．there’s only a little zinc in the human body

B．food rich in protein contains more zinc

C．some physical problems are caused by lack of zinc

D．any patient who receives zinc sulphate gets well immediately小题3:The best title for the passage may be _______.

A．A New Discovery

B．Zinc and Health

C．How Zinc Works

D．Add Zinc to Your Food

下列选项中，可以作为新设项目法人融资形式的是( )。

A．项目融资形式
B．合伙融资形式
C．股权融资形式
D．内部融资形式

出血热病毒属于下列哪一种基因类型的病毒( )

A．负链RNA
B．正链RNA
C．分节段
D．不分节段
E．双链RNA

行业、企业的发展有赖于高的经济效益，而高的经济效益源于高的员工素质。（）

某消防车利用双干线并联供带架水枪，每条干线的长度为5条Φ65mm胶里水带，带架水枪流量为10L/s，该水带并联系统的压力损失为多少104Pa。（水带的阻抗系数为0.035）（）

A、3.5

B、4.378

C、8.5

D、14.875