【判断题】客人在客房内物品丢失时,查找工作一般由保安人员及 客房服务员负责。
【单选题】检索钙(calcium)用于食品(food)或者饲料(feed)的添加剂(additive)的英文信息,检索式是:( )
A.
calcium and food or feed and additive
B.
(calcium and food or feed) and additive
C.
calcium and(food or feed)and additive
D.
(calcium and food) or (feed and additive)
【判断题】欧美国家政治运作情况与宋教仁和孙中山的政治主张完全相合。()
【单选题】检索磷酸盐( phosphate )用于食品( food)或者饲料(feed)的添加剂(additive)的英文信息,选择下列检索式
A.
food or feed and additive and phosphate
B.
food or (feed and additive and phosphate)
C.
(phosphate and food or feed) and additive
D.
(food or feed) and additive and phosphate
【判断题】宋教仁和孙中山的政治主张都与欧美国家政治运作情况完全相合。()