下列关于酮体的叙述，哪项是错误的A．酮体是乙酰乙酸、β-羟丁酸和丙酮的总称 B．生成

正常产后第三天， * * 涨满而痛，无红肿，伴低热，首先解决的方法是

A．芒硝敷 * *

B．用吸奶器吸奶

C．生麦芽煎汤喝

D．让新生儿多吸允双乳

E．少喝汤水

C

Could the solution to world future energy needs lie in the ocean? It’s possible.

We are not talking about oil, but another potential untapped energy resource called “methane hydrates”.

Methane hydrates are hard, ice-like white solids that form naturally in deposits (沉积物) on ocean floors. They arecomposed of water and highly concentrated methane produced by the microorganisms living in the deposits.

The remarkable thing is that you can hold a flame to a piece of methane hydrate and it will catch on fire. It’s been called “burning ice.”

Methane hydrates are spread around the world. These deposits may in the future become a very important fuel resource. One researcher calculated that a small area off the Southeastern coast of America may contain methane hydrates equal to 30 times the annual U.S. consumption of natural gas.

Right now there are very significant technical and financial challenges facing us before we could exploit this as a resource. Scientists around the world are studying these challenges. One big issue is how to get these methane hydrates off the ocean floor, causing undersea landslides and tidal waves.

Another issue is how to handle the matter after it is brought up. It’s also unclear whether it would make more sense to “mine” solid hydrates or tap the gases found with them. And many deposits may occur in low concentrations with no commercial potential.

Japan, which has no oil supplies of its own, has thrown itself into burning ice research because it has deposits off its shores which could make Japan less dependent on foreign suppliers of oil.

The U.S. Department of Energy and Congress are also supporting research. However, the US administration’s energy policy is focused on traditional fossil (化石) fuels. And at least for now, developing burning ice into a fuel source isn’t high on the energy industry’s list. But if natural gas continues to rise in price, exploiting burning ice might become economically practical.

59. What’s the meaning of the underlined word in Paragraph Two?

A. not existed              B. Unseen         C. available but not used              D. unreal

60. What can you learn from the text?

A. Burning ice has been used in some countries.

B. Applying burning ice tops the energy list in America.

C. Burning ice exists in few countries.

D. There are still some problems in developing the burning ice

61. Why has Japan already begun to develop the burning ice?

A. It is a developed country.  B. They want to help other countries.

C. It lacks oil supplies of its own. D. America asked Japan to do so.

62. Which one is the best title of the text?

A. World Energy Shortage           B. Burning Ice Holds Hope as Fuel Source

C. Methane Hydrates               D. Methane Hydrates Spread around the World

膀胱癌最可靠的诊断方法是()

A．B超

B．排泄性尿路造影

C．CT

D．尿脱落细胞检查

E．膀胱镜检及活检

DIC时，血液凝固性表现为（）

A.凝固性增高

B.凝固性降低

C.凝固性先降低后增高

D.凝固性先增高后降低

E.凝固性无明显变化

奇瑞A3轿车防夹控制器主要是通过检测电机内产生的的电压降来判断是否遇到较大阻力，该电路功能集成在前BCM内部，所以只有前排车窗有防夹功能。