按照市场行情约定价值的合同，合同履行时市场行情发生波动，则（_爱下问搜题

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问题单项选择题

按照市场行情约定价值的合同，合同履行时市场行情发生波动，则（）。

A.价格上涨按原价格执行，价格下降按新价格执行

B.价格下降按原价格执行，价格上涨按新价格执行

C.无论上涨还是下降均按新价格执行

D.无论上涨还是下降均按原合同价执行

答案

参考答案：C

填空题

从方框中选择适当的短语并用其正确形式完成句子。

look down at go the right way go through,
on the edge of at the bottom of look across to

1. "Don't stand                         the canyon. It's dangerous," the tour guide said.
2. You must                        a big gate to enter the house.
3. Have you ever heard the story about a frog                         a well?
4. I                         the other side of the road, but saw nothing.
5. Mr Brown didn't know if he was                       .
6. I                        the small house 100 metres below me.

多项选择题

下列属于标准件的是()。

A．齿轮

B．轴

C．弹簧

D．螺母、垫片

E．销、键

F．蜗轮