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  3. [originaltext] Exercise is beneficial to your heart. A 22 - year study was c

[originaltext] Exercise is beneficial to your heart. A 22 - year study was c

游客2024-02-13  19
问题  
Exercise is beneficial to your heart. A 22 - year study was conducted by doctors in California. They found that people who work at physical jobs experience fewer heart attacks than other people. The active people work all the time at moderated speeds. Their daily rountine gives them an adequate amount of exercise and helps them stay in shape. However, machines that can do heavy labor more speedily are replacing this type of work.
选项 A、Machines can do ,iil the physical work for man.
B、Machines cab do all the mental work for man.
C、All heavy labor should be replaced by machines.
D、All heavy labor shouldn’t be replaced by machines.
答案 D
解析 该题考查对关键句的把握。听时注意到短文最后一句中的表转折关系的副词however，由此可推知正确选项为D。实际四个选项中A和B，及C和D相矛盾，可缩小选择范围。
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