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【单选题】
“历史记录”面板具有依据历史记录进行纠错的功能。此面板记录了（）操作A.
十步
B.
五十步
C.
一百步
D.
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皮皮学刷刷变学霸
举一反三
【单选题】How do the Australians maintain their houses? ______
A.
They seldom clean the houses.
B.
They don’t care their houses very much.
C.
They clean their houses every day and keep everything in good order.
D.
A and
【单选题】According to the passage, how do human bodies maintain balance? ______
A.
They adjust themselves timely in line with their physical conditions.
B.
People increase or lower the body temperature by sweating.
C.
People's hearts pound to compensate when the blood pressure goes up.
D.
Both B and C.
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