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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:
第三段首句指出“In a planned company, it was often difficult to secure spare parts and so many companies ordered many extra parts and kept large supplies of parts so that if a mistake was made in planning, they could continue to produce.”,由此可知许多企业订购大量多余零部件以备不时之需,因此选项C符合题意。
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