单项选择题

What is crucial to the future work on the construction site in space

A．The arms.
B．The robot.
C．The robotic arm-to the station.
D．The shuttle.
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单项选择题
Concerning Dr. Kirk's stand on the problem, which of the following statements is NOT true
A．In his opinion, the college student and the professional he refers to should not be considered mentally ill.
B．Those people who do not have underlying and pathological mental state.
C．He uses the cases to illustrate his opinion that the current criteria are not tough enough.
D．He uses the cases to illustrate his opinion that people are always developing underlying mental illness.
单项选择题
The sentence in the ninth paragraph, researchers are not likely to have anything resembling a blood test for a mental illness soon means that_____.
A．mental illness can not be diagnosed by blood test.
B．there is not a definite criterion for mental illness.
C．researchers do not like to use blood test.
D．techniques have gained enough progress but are still not enough for mental illness.
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