许多同学上课不专心,总喜欢走神,或者爱在下面做小动作。我想发明一种端正思想仪。这种端正思想仪只有笔头那么大。将它安装在新式课桌内的一个角落,根本无人发现。当某个同学思想开小差,想贪玩,做小动作时,端正思想仪就会发出尖叫声,促使他及时把心收回来,坐端正了继续听老 Many students do not concentrate on class, always like to walk or love to do the trick below. I want to invent a correct thinking device. This kind of correct thinking device is only as big as the writing tip. Put it in a corner of the new desk, no one at all. When a classmate’s thinking is poor, want to play fun, do little tricks, correct ideology will make a scream, prompting him to promptly reclaim, sitting and continue to listen to the old