产业部门分类的依据是()。
参考答案:主产品的同质性
细菌性痢疾的传播途径是()。
A.呼吸道
B.消化道
C.虫媒传播
D.血液
E.接触传播
The library ________its hours to meet the needs of the students during the final exam period. [ ]
A. arranges
B. adapts
C. adjusts
D. varies