患者实验室检查结果：PT正常，APTT延长，APTT延长不被新鲜血清纠正，而被硫酸钡

—What _________ you _________ now?     

—I'm watching TV.[ ]

A. did; do       

B. are; doing       

C. do; do

女性，32岁。门诊就诊，2个月来干咳、胸闷憋气，心悸，呼吸困难，夜间发作明显，影响睡眠，既往有过敏性鼻炎，有类似发作病史。听诊双肺散在哮鸣音，心率110次／分。

治疗的方法是（）

A.给予地西泮，使患者得到休息

B.给予吸入糖皮质激素和支气管舒张剂，解痉平喘

C.给予普萘洛尔及胺碘酮，改善心悸

D.1‰肾上腺素1ml皮下注射，使症状迅速缓解

E.吸入色甘酸钠气雾剂

人类基因组中的功能序列可以分为哪几类？

Scientists are working to develop crop plants that can reduce the amount of water used for agriculture. Almost sixty percent of the world’s freshwater withdrawals from rivers, lakes and other water resources go toward irrigating fields.

Scientists are using biotechnology as well as traditional breeding methods to develop water-saving crops to feed a growing world.

Thomas “Tommy” Carter is a plant scientist in North Carolina. He works for the Agricultural Research Service in the United States Department of Agriculture. He leads Team Drought, a group of researchers at five universities. They have been using conventional breeding methods to develop and test soybeans that can grow well under dry conditions.

Tommy Carter started working on drought-resistant soybeans in 1981. His research has taken him as far as China, where soybeans have been grown for thousands of years.

Farmers in the United States, however, have grown soybeans for only about a century. Tommy Carter says the soybeans they grow are for the most part genetically similar. More differences could better protect crops against climate changes that can reduce production. Those changes include water shortages which could increase from global warming.

The Agriculture Department has a soybean germplasm(胚质) collection, a collection of genetic material passed from one generation to the next. Members of Team Drought studied more than 2,500 examples from the collection.

They looked at ones from the home of soybeans, Asia. They searched for germplasms that could keep plants from weakening and wilting (凋谢)during hot, dry summers in the United States.

Tommy Carter says they found only five. But these slow-wilting lines, he says, produce four to eight bushels（英斗）more than normal soybeans under drought conditions. The yield depends on location and environment.

Scientists are also working on other plants that either use less water or use it better, or both. For example, companies like Monsanto, DuPont and Syngenta have been developing corn with reduced water needs. Monsanto expects to be ready in a few years to market its first corn seeds genetically engineered to resist drought.

68. According to the passage, scientists try to find out how to _______.

A. grow crops with less water

B. increase crop production

C. feed a growing world

D. save the world’s water resource

69. Why did Tommy Carter come to China?

A. He likes traveling.

B. China has a long history.

C. He’s doing research into soybeans.

D. He works for the Agricultural Research Service.

70. What’s inferred from the passage?

A. Climate changes lead to global warming.

B. Water shortages contribute to global warming.

C. Genetically different soybeans need much water to grow.

D. Genetically different soybeans help to fight against damaging climate changes.

71. What do we know about slow-wilting plants talked about in the passage?

A. They yield big profits.

B. They can grow in almost any climate.

C. They seem to be drought-resistant.

D. They need much water for their growth.

矿井尘肺病的预防措施有（）。

A.加强矿井通风，把呼吸性粉尘排出至地面

B.湿式作业、煤层注水、使用水炮泥等，减少生产过程中的粉尘产生

C.净化风流、喷雾降尘、爆破后洒水，降低人员接触粉尘的浓度

D.加强个体防护

E.经常进行身体检查，注意个人卫生