How many of the first 120 square roots of natural numbers are rational numbers The position of the number a on the number axis is shown in the figure The square of a, Ba, C-A, the cube of Da chart A is on the left, 0 is in the middle, 1 is on the right

（1）11^2=121>120,
So there are 11 from 0 to 10;
(2) It should be - A. one of your options a and B must have missed a minus sign

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