Hello, boys and girls!
Pressure is a serious problem in today's world. Students in our class are under too much pressure. Some students can't get on well with their classmates, while other
如图所示,曲线为电荷在匀强电场中的运动轨迹,a、b是轨迹上的两点,则下列说法正确的是( )
下列说法正确的是( )
写出近义词。
撑船—____ 采—____ 艇—____
在下列方程中,关于x的分式方程的个数有( )个
①2x﹣3y=0;②x+12﹣3=2x7;③3x-2=5x;④x+1x-2+3;⑤2+1x2-x=6x2-1.