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单项选择题

The multi-tube boiler system made the Rocket, Robert's locomotive,______.

A．powerful
B．achieve a speed of 30 miles an hour
C．acquire 25 little tubes
D．good for hauling trains

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单项选择题According to the passage, what do student researchers often learn when they discuss their work in class

A．Other students rarely have objective comments about it.
B．Other students do not believe the researchers did the work themselves.
C．Some students feel that the conclusions are too obvious.
D．Some students do not understand the meaning of the researchers’ questions.

单项选择题According to the passage, what is one major criticism students often make of published research

A．The research has been done in unimportant fields.
B．The researchers did not adequately establish the relationships involved.
C．The researchers failed to provide an appropriate summary.
D．The research has not been written in an interesting way.

单项选择题What does the author think about trying to find weaknesses in other people's research

A．It should only be attempted by experienced researchers.
B．It may cause researchers to avoid publishing good work.
C．It is currently being done to excess.
D．It can be useful in planning future researc

单项选择题What does the author conclude about preparing suitable questions for a research project

A．It is more difficult than the student researcher may realize.
B．The researcher should get help from other people.
C．The questions should be brief so that they will he understood.
D．It is important to follow formulas closely.

单项选择题Which of the following statements is not true

A．Robots will be less expensive than they are now.
B．They will be used as aides for the disabled.
C．They will all be gentle and kind.
D．They will deal with intruders.