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单选题
In a planned economy it was often difficult to secure spare parts,
A

so many companies manufacture them all by themselves.

B

so many companies have to stop the production lines while waiting.

C

so many companies place large orders for emergencies.

D

so many companies feel quite headache about this problem.


参考答案

参考解析
解析:
第三段中提到“In a planned company, it was often difficult to secure spare parts and so many…to produce ”,由此可知答案选C。
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