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 live in a room painted light blue, you may feel ______.
A．happy and energetic
B．warm and excited
C．calm and relaxed
D．hot and restless
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.
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