鸡白痢的检疫利用（）原理。
A.过敏反应
B.沉淀反应
C.凝集反应
参考答案：C
Batavia was a completely new city, and it had very little _____ common with other cities. [ ]
A. by
B. at
C. in
D. on
调节好钙硫物质的量比可以提高炉内喷钙脱硫效果，一般要求Ca／S（）
A.＜3
B.≠3
C.＞3
D.≥3
y, and it had very little _____ common with other cities. [ ]