有几个力，如果它们产生的效果跟原来的一个力的效果相同，这几个力就称为原来那个力的分力。
参考答案：对
The clever boy made a hole in the wall, _______ he could see ______ was going on inside the house.
A．which;what
B．throughwhich;what
C．throughthat;what
D．what;that
从象牙纵剖面方向观察可见菱形网格的勒兹纹。
