【单选题】There is a _________of impatience in the tone of his voice.
【简答题】低压用的压力计弹簧管用()固定在插座内。
【多选题】Choose synonyms of "hint."
【单选题】At the outset there is the tentative hint of the first-due company bullying its way through midtown traffic.
【简答题】Case 2 I have an American friend. I have invited him several times, and at last he invited me to his home one day. He told me to get there at 3 p.m. I thought we could chat and have a meal together. I...
【简答题】低压用的压力计弹簧管用()固定在插座内,高压用的压力计弹簧管是用()连接的。
【单选题】What is the proper meaning of the word 'cue' in the second paragraph?
【多选题】在诱变育种的过程中,为何要将微生物制备成细胞或单孢子悬浮液的形式进行诱变呢?
【单选题】低压用的压力计弹簧管用( )固定在插座内。