John is such a(n) ________ boy that he doesn't want to do any work.
A:careless
B:lazy
C:ashamed
D:fashionable
“在用托盘天平侧物体质量”时,某同学用已调好的天平在测物体质量的过程中,通过增、减砝码后,发现指针在分度盘的中央刻度线左边一点,这时他应该( )
请你先动脑筋想一想,怎样放合适?