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【单选题】
ECR的主要目标是()A.
对客户的需求做出快速反应
B.
消除系统中不必要的成本和费用
C.
做好客户关系管理
D.
在电子商务环境中运行
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反馈参考答案：
举一反三
【单选题】It's still early in the morning. There isn't______in the office.
A.
anyone
B.
everyone
C.
nobody
D.
any people
【单选题】Since nobody is answering the phone, they ______.
A.
should have left
B.
must have left
C.
need have left
D.
can have left
【简答题】Nobody's answering the door. They ________ be out. (can/must)
【单选题】She can't help______the report because she's busy answering phones.
A.
to write
B.
writing
C.
to writing
D.
be written
参考解析：
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