内容正文:
【2024届高考】英语作业考试化40分钟卷系列之
真题及最新模拟题 七选五 87
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反思:
根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
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(2024·山西·二模)How Gardeners Can Reduce Risk of Fire
If you are selecting plants for your garden, knowing which plants offer some fire resistance and which are more flammable (易燃的) can serve you well.
Quicker to catch fire
Plants like bamboo that produce flammable substances such as aromatic oils, resins (树脂), wax, or sap, are among the quickest to catch fire. 1
Trees with thin bark (树皮) that falls off are usually more flammable than those without. And fine-needled plants like pine, juniper, and spruce contain resins. 2
Many kinds of grasses are highly flammable. Their ability to catch fire increases when they are left to stand dry over winter or during periods without rain. Additionally, too much heat dries out the soil and under such conditions, many kinds of plants turn into a fire starter.
Native vs. non-native
As a group, native plants aren’t necessarily less flammable than introduced kinds of plants. 3 That is because they spread quickly and are usually left alone by wildlife. The non-native plants spread faster than native plants, and often tolerate heat, heavy rain and lack of water better.
For the best fire resistance, choose trees that lose their leaves every year, like ash, and maple, rather than fine-needled trees. 4 Those plants with water-filled leaves include ice plants and sedums. Some groundcover plants are also slow burners.
What to look for in plants
The Washington State University Extension Service has published advice for choosing plants that are fire-resistant. 5 They include:
•High water content in leaves.
•Little or no seasonal gain of dead plant material.
•Open branching (th