如图,小明把一块三角形的玻璃打碎成了四块,现在要到玻璃店去配一块完全一样的玻璃,那么最省事的办法( )
A:选①去
B:选②去
C:选③去
D:选④去
氢元素和氧元素的本质区别是原子的()
如果直线y=3x+6与y=2x-4交点坐标为(a,b),则下列方程组中解是x=ay=b的是( )
温暖—____ 关爱—____ 幸福—____ 鼓励—____
1976年,____、____相继逝世后,____反革命集团加紧夺取党和国家最高领导权的阴谋活动。
– Why don't you go out to have fun?
– You see, we are studying for the tests these days. And we are ______ busy_____ we can't go out.