【单选题】By referring to the artificial grammar, the author intends to show ______
A.
its significance in the study.
B.
an inherent pattern being learnt.
C.
its resemblance to the lights.
D.
the importance of night's sleep.
【判断题】小容量晶体管调速器电路由于主回路并接了平波电抗器Ld,故电流输出波形得到改善。
【单选题】If you don’t work hard, it will be of no________ for others to help you. [ ]
【单选题】It can be inferred from the first paragraph that ______.
A.
every glance has its significance
B.
staring at a person is an expression of interest
C.
a gaze longer than 3 seconds is unacceptable
D.
a glance conveys more meaning than words
【单选题】If you don’t work hard, it will be of no significance for others to help you.