问答题

S4. What’ s the main idea of Paragraphs 4 and 5

【参考答案】

Practice helps improve our souse of hearing．
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单项选择题
A．It is found that people who work at mental jobs experience fewer heart attacks than other people.B．It is found that people who work at physical jobs experience fewer heart attacks than other people.C．It is found that people who work at heavy jobs experience fewer heart attacks than other people.D．It is found that people who work at easy jobs experience fewer heart attacks than other people.
A．It is found that people who work at mental jobs experience fewer heart attacks than other people.
B．It is found that people who work at physical jobs experience fewer heart attacks than other people.
C．It is found that people who work at heavy jobs experience fewer heart attacks than other people.
D．It is found that people who work at easy jobs experience fewer heart attacks than other people.
填空题
violin and piano。
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