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【多选题】
下列讲解内容中,属于地陪景点讲解主要内容的有()。A.
景点历史背景
B.
景点主要景观和特点
C.
景点游览环境
D.
景点的地位和价值
E.
景点每天接待量
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皮皮学刷刷变学霸
举一反三
【单选题】The young man promised to his parents, 'I would never ______ again.'
A.
let you down
B.
let you out
C.
let you in
D.
let you by
【单选题】Use of electronic mail (e-mail) has been wide-spread for more than a decade. E-mail simplifies the flow of ideas, connects people from distant offices, eliminates the need for meetings, and often boos...
A.
Appropriate Use of E-Mail
B.
E-Mail's Popularity
C.
E-Mail: The Ideal Form of Communication
D.
Why Phone Calls Are Better Than E-Mail
【单选题】Use of electronic mail (e-mail) has been wide-spread for more than a decade. E-mail simplifies the flow of ideas, connects people from distant offices, eliminates the need for meetings, and often boos...
A.
is not always the easiest way to connect people from distant offices.
B.
has changed considerably since it first began a decade ago.
C.
causes people to be unproductive when it is used incorrectly.
D.
is effective for certain kinds of messages but only if managed wisely.
【单选题】组成脱氧核糖核酸(DNA)的核苷酸不包括( )。
A.
腺嘌呤核苷酸(A)
B.
鸟嘌呤核苷酸(G)
C.
胞嘧啶核苷酸(C)
D.
尿嘧啶核苷酸(U)
E.
胸腺嘧啶核苷酸(T)
【单选题】组成核糖核酸(RNA)的核苷酸不包括( )。
A.
腺嘌呤核苷酸(A)
B.
鸟嘌呤核苷酸(G)
C.
胞嘧啶核苷酸(C)
D.
胸腺嘧啶核苷酸(T)
E.
尿嘧啶核苷酸(U)
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