何为最适宜温度?
参考答案:
当其它条件一定时,必有一个温度,在这个温度下氨合成反应将达最大值,这个温度称之为最适宜温度。
You can only tell the news to Tom,Jack and Bill,and __________ it should be kept.
A.among them
B.among whom
C.between them
D.between whom
空气动力学当量直径