题目内容

【题目】Some tourists’ visiting Tian’anmen Square during the holiday left a ________ of litter everywhere they went.

A. trail B. dot C. chain D. track

【答案】A

【解析】

试题分析:考查名词。A. trail痕迹;B. dot斑点;C. chain链、束缚 ;D. track足迹、小道。句意:在假期很多游客参观了天安门广场,留下了遍地垃圾。故选A。

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【题目】 The tall manchineel tree that is native to the Caribbean, Florida, South America, Central America and the Bahamas, looks particularly attractive. But you may be wise to notice the warning given that the tree holds the Guinness World Record for “the world’s most dangerous tree”.

The deadliness begins with the sweet-smelling fruit. As British radiologist Nicola Strickland and her friend discovered, even a single bite of the green apple-like produce can lead to hours of suffering. The scientist says within minutes of eating the fruit, she and her friend experienced “a strange peppery feeling” in their mouths. A few hours later, the two could barely swallow any solid food. Fortunately, the symptoms started to reduce after about eight hours and the fruit did not cause any long-term damage.

Many plants have poisonous bark and leaves to prevent grass-eating animals. However, the fruits are usually edible allowing animals to feed on them or carry seeds to help with reproduction. But since the manchineel fruits are largely transported by ocean tides, the tree does not need help to reproduce.

The tree’s thick and milky white sap (树液) is equally dangerous. Contact with the skin can lead to symptoms that range from headaches to respiratory(呼吸) problems. Exposure to the eye can even cause “temporary painful blindness”. Given that the sap’s most dangerous toxin is highly water soluble, experts advise not using the tree for shade during a rain shower, as raindrops carrying the sap could easily burn your skin.

The fear has resulted in almost destroying the tree in Florida where it is on the list of endangered species. While removing it altogether may seem like the logical solution, experts argue that the manchineel trees are important for local ecosystems. In addition to protecting against ocean winds, the dense manchineel trees also prevent ocean erosion in Central America. The tree’s wood is very popular with Caribbean carpenters who have learned to neutralize its poisonous sap by drying the bark in the sun. In Central and South America, the locals use the bark to treat body swelling caused by injury and infection.

1Which of the following best explains “edible” underlined in Paragraph 3?

A.Fit to eat.B.Easy to pick.C.Hard to find.D.Nice to look at.

2Which of the following about the manchineel tree is true?

A.Its fruits taste sweet.

B.It reproduces by ocean tides.

C.Your eyes may be blind at the sight of it.

D.You have difficulty breathing in its shade.

3What is mainly talked about in the last paragraph?

A.The medical use of the manchineel trees.

B.The important role of the manchineel trees.

C.The urgent need of protecting the manchineel trees.

D.The way of removing poisonous sap from the trees.

4Which of the following can best show the structure of the passage?

A.B.C.D.

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