单项选择题

When weighing things, a scientist ______.

A．adopts a more accurate measurement than a baker does
B．uses a scale working on completely different principles
C．has to construct a lab with a variety of apparatus
D．turns to scientific investigation by instinct

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热门试题

单项选择题

According to the passage, the smart-highway technology is aimed to ______.

A．deploy sophisticated facilities on the interstate highways
B．provide passenger vehicles with a variety of services
C．optimize the highway capabilities
D．improve communication between driver and the people who monitor traffic

单项选择题

Which of the following statements can be inferred from the passage

A．People are still searching for better solutions to the traffic problem.
B．Smart-highway technology is the ultimate solution to traffic gridlock.
C．High-tech approach can solve traffic gridlock entirely.
D．The traffic problems will be solved completely in the next 20 years.