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An Intelligent Car
Driving needs sharp eyes, keen ears, quick brain, and coordination(协调)
between hands and the brain. Many human drivers have all {{U}} (51)
{{/U}} and can control a fast-moving ear. But how does an intelligent car
control itself
There is a virtual(虚拟) driver in the smart car.
This virtual driver has "eyes", "brains", "hands" and "feet" too. The
minicameras {{U}} (52) {{/U}} each side of the ear are his "eyes" which
{{U}} (53) {{/U}} the road conditions ahead of it. They watch the
{{U}} (54) {{/U}} to the car’s left and right. There is also a highly
automatic driving {{U}} (55) {{/U}} in the car. It is the built-in
computer, which is the virtual driver’s "brain". His "brain" {{U}} (56)
{{/U}} the speeds of other moving cars near it
A. stops
B. finds
C. controls
D. selects
更多"下面的短文有15处空白，请根据短文内容为每处空白确定1个最佳选项。
"的相关试题:
[单项选择] 下面的短文有15处空白，请根据短文内容为每处空白确定1个最佳选项。
{{B}}Staying Active
in Old Age Keeps People Mobile{{/B}}
People over 70 who aren’t
active are more likely to develop problems walking or climbing stairs within a
few years, according to a new study.
These findings suggest that
it’s very important to stay______(51) in old age, study author Dr. Marjolein
Visser told Reuters Health.
"Physical activity in old age is as
important______(52) taking your medications (药物)," Visser noted. "You do not
need to join an expensive, fancy sports club with high-tech (高科技的) equipment.
Your body will already______(53) from regular walking."
Visser,
a Dutch (荷兰的) scholar, explained that______(54) active helps prevent people from
becoming breathless during simple activities, increase muscle mass and strength,
and maintain the
A. symptoms
B. issues
C. problems
D. chances
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