为了准备班级里的元旦联欢会,班长以全班同学爱吃哪几种水果作了民意调查,以决定最终买什么水果,最好选用下面哪个数据( ) A.平均数 B.中位数 C.众数 D.以上都不是 答案:C
B
China is going green.In
order to reduce air pollution and oil shortages, carmakers have announced their
plans to develop hybrid vehicles (混合燃料汽车) for the
Chinese market.Toyota’s hybrid car Prius will be ready to drive
in China this week.Let’s have a look at the new car.
Any vehicle is a hybrid
run on a rechargeable battery and gas.Hybrid cars have
special engines, which are smaller than traditional gas engines.The
gasoline engine provides 99 percent of the power when the car is going at a
steady speed. A specially designed battery motor provides extra power for
running up hills or when it needs to speed up.
Step into a Prius, and
turn on the engine.The first thing you notice is that it is quieter
than a traditional car.At this point, the car’s gas engine is at rest.The
electric motor will provide power until the car reaches about 24km/h.If
you stay at a low speed, you are effectively driving an electric car, with no
gas being used, and no waste gas given off.
The computer decides when
to use the gas engine, when to go electric, and when to use a combination of
the two.If you go over 24km/h, when you step on the gas
pedal (油门), you are telling the computer how fast you
want to go.
The electric motor
recharges automatically using a set of batteries.And when driving
at a high speed, the gas engine not only powers the car but also recharges the
batteries.When you use the brake, the electric motor in
the wheels will work like a generator (发电机) to produce
electricity to recharge the batteries.As a result, the
car’s batteries will last for around 200,000 miles.
66.The
underlined sentence probably means ________.
A.there
will be more and more green land in China
B.China’s
new cars are combinations of different green models
C.China
is still young and lacking in experience
D.the
environment is getting better in China
67. What is the most
important feature of hybrid cars?
A. They are powered by
both a rechargeable battery and gas.
B. They have smaller
engines than traditional gas ones.
C. They only use 99
percent of their power to run up hill.
D. They are much
quieter than traditional cars.
68. We can know from
the story that ________.
A. the gas engine
recharges the batteries as well as powering the car
B. using the brake
suggests that the gas engine should work
C. the car’s batteries
will last for around 200,000 miles without being recharged
D. the batteries can be
recharged at any time you want
69. The author writes
the passage mainly to________.
A. announce plans to
develop hybrid vehicles for the Chinese market
B. let people know how
to save their gas when driving a car
C. teach people how to
drive a hybrid car
D. introduce a new kind
of “green” car
70.Which
of the following statements is TRUE according to the text?
A.The
hybrid car is environmentally friendly.
B.The
hybrid car is unable to get itself recharged.
C.The
hybrid car has been made in mass.
D.The
hybrid car can decide what power to use