多项选择题

We are about to introduce bidding documents which consists of ( ), ( ), ( ) and ( ).
A. Call for Bids advertisement;

B. From the Employer to the Potential Bidder;

C. letter of formal invitation;

D. Letter of acceptance.

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单项选择题

A. 稳定

B. 不稳定

C. 临界稳定

D. 不确定

单项选择题

Which of the following is the most important to New Zealand's economy in terms of its contribution to the GDP and employment?
A、Agriculture.
B、Forestry.
C、Fishing.
D、The service sector.