“父母呼应勿缓”是指缓慢的意思。
参考答案：对
Daniel is good at DIY. He can ________ different kinds of things with his hands. [ ]
A. write
B. play
C. watch
D. make
在提供相同照度的情况下，日光灯改用T5灯，节电率（）以上。
A.30%
B.40%
C.50%
