题目内容
（请给出正确答案）
By "if the fuel isn't there, the spark is useless", the author means______.
A．carbohydrates, protein and fat are enough to sustain a human life
B．vitamins and minerals are virtually of no value
C．carbohydrates, protein and fat are as important as vitamins and minerals
D．without carbohydrates, protein and fat, vitamins and minerals are of no use
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更多“By "if the fuel isn't there, t…”相关的问题
e control. It seems a dream in the future. It isn't.
In many ways such driverless cars are already with us. There is partial automation in many cars, such as intelligent braking, lane departure warning and automatic parking. The systems are there {A; B; C} cars can pretty much drive themselves. No one noticed the introduction of cruise control. We've got collision avoidance, and we'll soon have automatic lane change.
Improving this technology should make the roads safer. Machines are much better at following rules than humans. Driveway signs advise drivers to slow down to avoid {A; B; C} jams. They are often ignored by drivers. But it won't happen {A; B; C} a computer. Driverless cars could also choose the best route to avoid traffic jams.
Fewer jams will mean {A; B; C} stop-start driving. Maintaining smooth and constant speeds will improve fuel efficiency. Computers could also be programmed to take the greenest route, rather than the fastest one. Under computer control, cars could also travel much closer together.
They can effectively “slipstream” one another and use less fuel to move themselves forward. They can even form. multi-car “trains” going {A; B; C} high speeds. However, with driverless cars on the roads, there will be potential trust issues between people and machines. We could therefore see guard rails back on the sides of pavements. This would be a backwards step.
1. A. because B. so that C. such as
2. A. creating B. to creat C. creat
3. A. with B. to C. on
4. A. more B. little C. less
5. A. over B. in C. at
A.lgnition coil
B.Fuel filter
C.Starter
D.Fuel Injector
A.额外燃油（Additional Fuel）
B.酌情携带的燃油（Discretionary Fuel）
C.不可预期燃油（CONT FUEL）
A．substitutes
B．substances
C．subsequences
D．subsidies
All ______ is a continuous supply of fuel oil.
A．what is needed
B．that is needed
C．the thing is needed
D．for their needs
