试述动脉粥样硬化的易患因素。

第一次世界大战前，帝国主义两大军事集团最终形成的标志是

A．1879年德国与奥匈帝国结盟

B．1892年法国与俄国签订《军事协定草案》

C．1882年德、奥、意缔结《三国同盟条约》

D．1907年《英俄协约》签订

药物的毒性反应是指

A．药物引起的生理生化功能异常和病理变化

B．药物引起的生理生化功能异常

C．药物引起的生理功能异常

D．药物引起的生化功能异常

E．药物引起的病理变化

In the face of rising gas costs, many consumers are beginning to consider the choice of a hybrid(混合动力的) vehicle--one which operates on both gas and electricity. All of the models of hybrid car will save money, but are they really effective when all of the costs of maintenance(维修) and other considerations are included in?

First of all, consider the cost of buying a hybrid vehicle. Depending on the model, hybrid vehicles can cost anywhere from $2,000 to $5,000 more than the traditional models. However, some say that as the hybrid cars become increasingly more available as a reflection of demand, the prices can be expected to drop, making them more cost effective when it comes to the initial investment(初始投资).

Also important to keep in mind is the fact that the hybrid cars have a much more specialized system than the standard vehicle, and will therefore require more specialized workers to repair them when they break down.

It seems as though, at least for the time being, the purchase of a hybrid vehicle for the average consumer may not be the best choice when it comes to saving money. It is important to keep several things in mind, however, when considering purchasing a hybrid model. Many consumers are choosing to purchase these cars because they represent a significant development in terms of environmental concerns over standard models. They also mean that as a whole, Western nations will become less dependent on oil as the only means of power.

Finally, it is necessary to remember that the hybrid car is a very new technology. Developed only within the last few years, the technology is still in the starting stage, where costs will continue to be high. As time passes, the development of the hybrid technology will begin to push prices down to the point where hybrids are more competitive with the traditionally fueled models of the past.

72.What is the purpose of writing this article?

A. To tell the readers about the advantages of hybrid cars.

B. To warn the readers of the disadvantages of hybrid cars.

C. To advise people to think twice before buying hybrid cars.

D. To call on people to buy hybrid cars to protect the environment.

73.Which is the benefit of hybrid cars?

A. Consuming less gas.         B. Being easier to drive.

C. Lower initial investment.  D. Lower maintenance cost.

74.What do we know from the passage?

A. The hybrid technology is very new and mature as well.

B. It’s not easy to repair a hybrid car due to its special system.

C. Many average consumers can not afford to buy hybrid cars.

D. The traditional vehicles are much safer to drive than hybrid cars.

75.We can infer from the passage that          in the future.

A. the traditional cars will gradually disappear

B. the hybrid vehicles will gradually disappear

C. the cost of hybrid cars will be more reasonable

D. the hybrid technology will bring oil prices down

变质岩的分类首先考虑是（）。

A.矿物组成

B.构造特征

C.结构特征

D.化学成分

在申请品种审定时，申请书应填写哪些内容？