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一、选择题 (每题 2分 ,共 1 6分 )1 .下面式子正确的是 ( ) . (A)x3·x2 =x6 (B)x5+x5=x10 (C)x6 ÷x3=x2 (D) (x3) 3=x92 .天安门广场的面积约为 44万平方米 ,请你估计一下 ,它的百万分之一大约相
First, the multiple-choice questions (2 points for each question, a total of 16 points) 1. The following equation is correct (). (A) x3 x2 = x6 (B) x5 + x5 = x10 (C) x6 x3 = x2 (D) (x3) 3=x92. The area of Tiananmen Square is about 440,000 square meters. Please estimate that it is about 1 millionth of an area.