单项选择题

Computers and high-tech tools did all the following for American athletes EXCEPT_________.

A．analyzing their performances
B．suggesting ways to improve
C．identifying their weaknesses
D．improving their performances easily
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单项选择题
If you are working in a warm —color surrounding, which of the following is most likely to happen
A．Severe headache.
B．Low blood pressure.
C．Rapid heartbeat.
D．Breathing difficulty.
单项选择题
Which of the following statements is NOT true according to the passage
A．Light blue can help us think better.
B．Yellows can make us feel happy.
C．Oranges can raise children'sI. Q.
D．White can help us concentrate on our studies.
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