慢粒化疗首选药物（）。 A.环磷酰胺 B.美法仑 C.马利兰 D. A.r A.-

对于平抛运动（不计空气阻力，g为已知），下列条件中可确定物体飞行时间的是：

A．已知水平位移

B．已知下落高度

C．已知末速度

D．已知位移的大小

阅读理解。

     CHINA'S first pure electric vehicle, BYD e6, went on sale in Shenzhen yesterday.

      The latest product for BYD, a domestic pioneer in developing alternative-energy vehicles based

in Shenzhen, the e6 combines state-of-the-art technology developed in a joint venture (合资企业)

between BYD and the U.S.-based Daimler, Shenzhen Economic Daily reported yesterday.

     The e6 carries a price tag of 369,800 yuan (US$56,030), according to BYD, which expected to

sell about 300 e6s each month in Shenzhen.

     Prospective buyers, however, will only have to pay 249,800 yuan for an e6, because in July last

year, the city government started providing an extra 60,000 yuan subsidy to buyers of pure electric

cars on the basis of a national subsidy of 60,000 yuan.

     According to the manufacturer's Vice President Lian Yubo, the BYD e6 possesses several examples

of world-class technology, including intelligent keyless entry, voice recognition navigation system,

on-board digital television, rear-view reverse camera and other accessories (附件). With the application

of iCloud technology, motorists will also be able to use their iPhones or other mobile phones running

an Android system to unlock and lock the car, control air conditioning, as well as monitor the location

of the vehicle.

     Lian said BYD and Daimler would cooperate to release more electric vehicles.

     Powered by recyclable and environmentally friendly iron-based batteries produced by BYD and

using 19.5 kwh of electricity per 100 km with no emissions, the e6 is capable of a maximum speed of

140 km per hour, the paper said. The car can run up to 300 km without a recharge.

     It will take only one hour to recharge the e6 batteries to their full capacity at a charging station but

five to six hours will be needed for a full charge at charging stands installed in parking lots.

     Shenzhen has been accelerating the construction of large charging stations. In addition, owners of

electric cars can apply to have charging stands installed in their residential communities.

1. What is the best title for the passage?

A. BYD's most advanced product on sale    

B. New technology used in BYD e6

C. Car industry develops fast in Shenzhen    

D. China's first pure electric car released

2. How much money will a Shenzhen resident save if he buys a BYD e6 presently? 

A. 369,800 yuan    

B. 249,800 yuan    

C. 120,000 yuan    

D. 60,000 yuan

3. BYD e6 has the following technology EXCEPT __________.

A. an Android system               

B. keyless starting

C. voice navigation                 

D. a digital camera

4. What can we infer from the last two paragraphs? 

A. Charging at a charging stands takes shorter time than at a charging station.

B. The charging of the electric car will surely get more convenient in the future.

C. Charging stands will soon be installed in all residential communities.

D. Charging stations will probably take the place of traditional gas stations.

5. Which of the following statements is TRUE?

A. The e6 uses batteries developed in a joint venture.

B. Daimler is a major car producer based in Shenzhen.

C. BYD pioneers in China in developing electric cars. 

D. The e6 can run at a maximum speed of 300 km per hour.

分析盐官镇成为观赏钱塘江涌潮最佳地点的原因？

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2M接口的阻抗特性一般有非平衡式的（）Ω和平衡式的（）Ω两种。

简述球墨铸铁进行热处理的原因。