单项选择题
A.3倍B.4倍C.6倍D.12倍
A.<+8.00DB.<+10.00DC.<+12.00DD.<+16.00D
A.+2.00DB.-2.00DC.+4.00DD.-4.00D
A.看电视或电脑B.烹饪C.行走D.驾驶
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