使用万用表测量在选择量程时,应使指针移动至满刻度约1/2或2/3处。
参考答案:对
It's very cold outside. Please _______ the door. [ ]
A. open
B. don't open
C. not open
D. didn't open
历史课上,海伦被罚站在大教室的中央,表现得()。
A.很伤心
B.很气愤
C.很羞愧
D.很镇定