A:捉摸而后声明玩火自焚
B:琢磨尔后申明自食其果
C:捉摸尔后申明自作自受
D:琢磨而后声明作茧自缚
如图a所示是“研究平抛物体的运动”的实验装置图.
—I have trouble learning math this term.
—You should pay more _______ to your teacher's advice.
There are many famous ____ (direct) in China, such as Zhang Yimou, Chen Kaige and so on.
在“探究影响浮力大小的因素”实验中,物体A静止时,弹簧测力计示数分别如图所示,试回答下列问题: