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【单选题】
一类动物疫病中的牛病有( )等。A.
牛瘟.牛白血病
B.
牛瘟、牛海绵状脑病
C.
牛传染性胸膜肺炎.牛结核病
D.
虫病、牛出血性败血病
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反馈参考答案：
举一反三
【多选题】Which two of the following statements capture the main purposes of the Service class?
A.
To support long-running, in the background operations.
B.
To manage concurrent access to shared databases.
C.
To provide an application's user interface.
D.
To enable remote (inter-process) operations.
【单选题】Which of the following is NOT one of the main purposes of management accounting?
A.
Planning
B.
Reporting
C.
Decision making
D.
Controlling
【单选题】According to the passage, the main purposes of futures contracts are ______.
A.
to hedge
B.
to speculate
C.
to arbitrage
D.
all of the above
【简答题】What are the main purposes of marketing
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