题目内容
某企业产量和混合成本情况下表：
则采用高低点法确定的单位变动成本为()元。
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第二节 完型填空
阅读下面短文，从短文后所给各题的四个选项(A、B、C和D)中选出能填入相应空白处的最佳选项。
As she walked round the large shop, Edith realized how difficult it was to choose a suitable Christmas 【B1】 for her father.
She 【B2】 that he were as easy to please as her mother, who was 【B3】 satisfied with perfume (香水). 【B4】 , shopping at this time of the year was a most 【B5】 job. People 【B6】 on your feet, pushed you with their shoulders and almost 【B7】 you over in their hurry in order to 【B8】 something cheap ahead of you.
Partly to have a rest, Edith paused in front of a counter, where some beautiful ties were on 【B9】 . "They are 【B10】 silk," the shop assistant told her with a smile trying to 【B11】 her to buy one. But Edith knew from past 【B12】 that her choice of ties hardly ever pleased her father.
She moved on slowly and then, quite by chance, 【B13】 where a small crowd of men had gathered round a counter. She found some fine pipes on sale and the 【B14】 were very beautiful. Edith did not hesitate for long, although her father 【B15】 smoked a pipe once in a while, she believed this was 【B16】 to please him.
When she got home, with her small but 【B17】 present hidden in her handbag, it was time for supper and her parents were already 【B18】 table. Her mother was in great 【B19】 "Your father has at last decided to stop smoking," she told her daughter happily. Edith was so 【B20】 that she could not say a single word.
【B1】
我国大连商品交易所黄大豆1号期货合约对应的标的是榨油用大豆，而黄大豆2号期货合约定位于食用大豆。()
A．thatB．whoC．whichD．what
关于合同的生效错误的是()。
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