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A、Keep the garden watered. B、Cover plants and small trees with cloth or paper. C、Place Christmas lights on young trees. D、Move t
A、Keep the garden watered. B、Cover plants and small trees with cloth or paper. C、Place Christmas lights on young trees. D、Move t
admin
2014-09-30
40
问题
Florida is located in the southeastern United States. It’s called the Sunshine State. It grows more oranges than anyplace except Brazil. Recently, Arctic air has damaged some Florida oranges and strawberries, and killed fish at tropical fish farms. However,(16)protecting plants and trees in the garden may not be too difficult if you follow a few suggestions. Sudden cold can be the biggest threat, especially after a warm period. Plants have not had a chance to harden their defenses. Those that are actively growing or flowering are at high risk. Try to choose planting areas that face west and south. (17)Being near other growth may also provide warmth. Most frost damage takes place at night. Ice crystals form on the leaf surface.(18)They pull moisture from the leaves and keep plant tissues from getting water. Cold weather is most likely to damage or kill plants that do not have enough moisture. So keep the garden watered. Moist soil absorbs more heat than loose, dry soil covered with vegetation. University of Arizona extension experts say covering plants and small trees with cloth or paper can help prevent frost damage. A 100-watt light bulb designed for outdoor use can also provide warmth. Some people place Christmas lights on young trees for warmth. The bulbs should hang below the leaves to let the heat rise into the tree.
16. What’s the main idea of the passage?
17. Which one is an improper way to protect trees?
18. How do ice crystals damage the plants?
选项
A、Keep the garden watered.
B、Cover plants and small trees with cloth or paper.
C、Place Christmas lights on young trees.
D、Move the plants far away from other growth.
答案
D
解析
短文中提到,靠近其他植物可以为树木提供热量,因此树木应该彼此离得近一点。D)的内容与此意恰好相反。
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0
大学英语四级
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