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计算 1+ 1 2 +1+ 1 2 + 1 3 + 2 3 +1+ 2 3 + 1 3 + 1 4 + 1 2 + 3 4 +1+ 3 4 + 1 2 + 1 4 + …+ 1 20 + 1 10 + 3 20 + 4 20 +…+ 19 20 +1+ 19 20 +…+ 1 20 ．
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举一反三
【单选题】When employees believe in the mission of the company, ______.
A.
the company will get bigger and bigger
B.
they don't mind how much salary they get
C.
they will make great efforts for the mission
D.
they don't care so much about the company's products
【单选题】Yes, invest in Inter Media It's definitely a company that is _________.
A.
making up
B.
going places
C.
without a hitch
【单选题】He _____by different people in the company.
A.
interviewed
B.
was interviewing
C.
was interviewed
【多选题】Which of the following choices could be covered when describing a company ?
A.
How many employees do you have ?
B.
What is your company's line of business
C.
What kind of products and services do your company provide ?
D.
When was your company founded ?
【简答题】He joined the company when it was in a slump.
【单选题】When will a company renew an existing model?
A.
When it sells well and brings in a good profit.
B.
When it needs improvement to meet the needs of users.
C.
When some of its features have to be deleted.
D.
When certain options have to be added.
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