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【多选题】
研究旅客运输心理学的作用主要有 ( )。A.
提高客运服务的主动性
B.
提高客运服务的针对性
C.
提高客运服务的周到性
D.
提高客运管理工作水平
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【单选题】— Is Mr. Smith in his office now? — No, he _____ there. I _____ him in the library a minute ago. [ ]
A.
may be, saw
B.
can't be, see
C.
mustn't be, see
D.
can't be, saw
【单选题】— Is Mr. Smith in the office? — Yes , he must be there , ________ he is in charge of the office .
A.
since
B.
however
C.
whether
D.
for
【多选题】啤酒花作为啤酒的香料,在啤酒中的作用( )
A.
赋予啤酒特有的酒花香味、爽口的苦味
B.
提高啤酒泡沫的持久性
C.
促进蛋白质沉淀，有利啤酒澄清
D.
酒花有抑菌作用，加入麦汁中能增强麦汁和啤酒的防腐能力
【单选题】—Is Mr. Smith in? —No, he's asked for __________ leave. [ ]
A.
a two week's
B.
a two-week
C.
a two-week's
D.
a two weeks
【单选题】Is Mr. Smith in the office? - Yes,________ he is in charge of the office,he must be there.
A.
since
B.
however
C.
whether
D.
for
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