题干

《经济时报》载文指出,农产品从长期短缺到相对富余,并不意味着“物多必贱”,相反农民可以通过改变作物种植方式及搞好贮藏,巧妙利用时间差,从微观上创造大量“物以稀为贵”的市场机会。“打好时间差”是指

A:使个别劳动时间低于社会必要劳动时间

B:利用市场的供求机制,获取更多收益

C:提高劳动生产率,生产出更优质的产品

D:节约劳动时间,提高经济效益

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答案(点此获取答案解析)

B

同类题2

根据短文理解,选择正确答案。

The Sands of Time

    St Cyrus National Nature Reserve is much more than just golden sands and beautiful flowers. The area has a long human history too. From Stone Age hunters to amazing pioneers, discover the daring deeds and sad stories from St Cyrus' past.

Date: 23rd August 2010

Time. 2 p. m.—3:45 p. m.

Type of event. Guided walk

Between the Tides

    A celebration of the world between the tides. Join local salmon (大马哈鱼) fisherman Jim Ritchie on a fascinating walk to learn how local folk have made a living from the world between the tides, harvesting salmon from the beach at St Cyrus for hundreds of years.

Date: 25th August 2010

Time: 2 p. m.—4 p.m.

Type of event: Family event

Ice & Fire

    St Cyrus National Nature Reserve has had an eventful life! From its days near the equator (赤道) to volcanic eruptions and ice ages. Celebrate the start of Scottish Geology Month with a walk through the reserve and travel back in time to uncover the clues to St Cyrus' past hidden in the cliffs.

Date: 31st August 2010

Time: 2 p. m.—3:45 p. m.

Type of event: Guided walk

Scary Stories

    It's getting darker at nights... it's almost Halloween, when the ghosts (鬼怪) come out to play. Join us for some spooky stories of Dinnet and Deeside long ago... and listen out for things that sound strange in the night!

Date: 25th October 2010

Time: 7 p. m.—9 p. m.

Type of event: Family event

Note:

* All under 18's must be accompanied by an adult

* Pets allowed: No

* Cost: Free

* Phone: 01674­830736

* Location: SNH Visitor Centre, St Cyrus National Nature Reserve