6.下列说法正确的是( )
| A. | 9的平方根是3 | B. | 8的立方根是±2 | ||
| C. | $\sqrt{x}$=x | D. | -$\root{5}{{a}^{2}+1}$一定是负数 |
3.
如图,△ABC的角平分线相交于点P,∠BPC=125°,则∠A的度数为( )
| A. | 60° | B. | 65° | C. | 70° | D. | 75° |
2.
如图所示,小华从A点出发,沿直线前进10米后左转20°,再沿直线前进10米,又向左转20°,…,照这样走下去,他第一次回到出发地A点时,一共走的路程是( )
0 294594 294602 294608 294612 294618 294620 294624 294630 294632 294638 294644 294648 294650 294654 294660 294662 294668 294672 294674 294678 294680 294684 294686 294688 294689 294690 294692 294693 294694 294696 294698 294702 294704 294708 294710 294714 294720 294722 294728 294732 294734 294738 294744 294750 294752 294758 294762 294764 294770 294774 294780 294788 366461
| A. | 200米 | B. | 180米 | C. | 160米 | D. | 140米 |