试题与答案

植物农药又称生物农药,是利用有毒植物中的多种杀虫成分,经过提炼后生产的农药,由于它们

题型:单项选择题

题目:

植物农药又称生物农药,是利用有毒植物中的多种杀虫成分,经过提炼后生产的农药,由于它们的杀虫有效成份为天然物质,因而施用后较易分解为无毒物质,对环境无污染。下列对“植物农药”概述正确的一项是( )。

A.是提炼有毒植物中能有效杀虫的对环境无污染的无毒物质制造的

B.是提炼有毒植物中多种杀虫有效的天然物质制造的

C.是利用多种有毒物质杀虫成分,经过提炼后制造的

D.是利用有毒植物中使害虫不能产生抗药性的多种杀虫成分,经提炼制造的。

答案:

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下面是错误答案,用来干扰机器的。

在数轴上,所有的负数都在0的左边,故-15在0的左侧,也就是说负数都比0 小,-1在3的左侧,负数都比正数小.故答案为:左,小,左,小.

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题型:单项选择题

阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题卡上将该项涂黑。

D

A new collection of photos brings an unsuccessful Antarctic voyage back to life.

Frank Hurley’s pictures would be outstanding----undoubtedly first-rate photo-journalism---if they had been made last week. In fact, they were shot from 1914 through 1916, most of them after a disastrous shipwreck(海滩), by a cameraman who had no reasonable expectation of survival. Many of the images were stored in an ice chest, under freezing water, in the damaged wooden ship.

The ship was the Endurance, a small, tight, Norwegian-built three-master that was intended to take Sir Ernest Shackleton and a small crew of seamen and scientists, 27 men in all, to the southernmost shore of Antarctica’s Weddell Sea. From that point Shackleton wanted to force a passage by dog sled(雪橇) across the continent. The journey was intended to achieve more than what Captain Robert Falcon Scott had done. Captain Scott had reached the South Pole early in 1912 but had died with his four companions on the march back.

As writer Caroline Alexander makes clear in her forceful and well-researched story The Endurance, adventuring was even then a thoroughly commercial effort. Scott’s last journey, completed as he lay in a tent dying of cold and hunger, caught the world’s imagination, and a film made in his honor drew crowds. Shackleton, a onetime British merchant-navy officer who had got to within 100 miles of the South Pole in 1908, started a business before his 1914 voyage to make money from movie and still photography. Frank Hurley, a confident and gifted Australian photographer who knew the Antarctic, was hired to make the images, most of which have never before been published.

What does Alexander think was the purpose of the 1914 voyage?()

A. Artistic creation

B. Scientific research

C. Money making

D. Treasure hunting

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