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例1.质量为2.5×10~7毫克所表示的物体是( )。 (A)一头小象 (B)一只蚂蚁 (C)一个小学生(D)一个苹果 例2.一个质量为50千克的人,他整个身体的体积大约是( )。 (A)0.005米~3(B)0.01米~3
Example 1. The mass represented by 2.5 x 10-7 mg is (). (A) A baby elephant (B) An ant (C) A pupil (D) An apple Example 2. A man with a mass of 50 kilograms. His entire body is approximately (). (A) 0.005 meters ~ 3 (B) 0.01 meters ~ 3