Question

【題目】 Plants on mountains

Mountains are more than 500 meters tall and it’s not easy for plants to live on them. The wind is strong. The soil is thin and rocky. Which plants can live there? Come and see some of them.

	They look like a small cushion(墊子). They grow together and they are less than 30 cm tall. But they can be 3 meters wide. People also call the plants “ecosystem engineers”. That’s because many other plants live under them. Cushion plants keep the cold away. They make the soil inside soft and wet. In this way, cushion plants help other plants survive(生存).
	The snow lotus lives at elevations ranging from 2,400 to 4,000 meters. The climate there is cold. It always snows and the air is thin. Most plants will die. But the snow lotus grows well. A snow lotus can be 15 to 35 cm tall. People use it in medicine.
	The evergreen saxifrage has star-shaped flowers. Most saxifrages are very small — less than 12 cm tall. They grow very slowly in cold environments. Saxifrages can live both in the mountains and in your garden, yet they are not resistant (耐受的) to high temperatures.

【1】According to the passage, which are the smallest plants?

A.Cushion plantsB.Snow lotusesC.Saxifrages

【2】What do we know about cushion plants?

A.They can grow up to 3 meters tall.

B.They can protect the plants under them from the cold.

C.They need to live in soft and wet soil.

【3】Which plants can be used in medicine?

A.Cushion plantsB.Snow lotusesC.Saxifrages

Answer 1

【答案】

【1】C

【2】B

【3】B

【解析】

本文是一篇說明文，主要介紹了高山上植物很難生存，土壤薄而多巖石。在這種條件下，有部分種類的植物可以生存。本文主要介紹了在高山上生存的三種植物。

【1】

細(xì)節(jié)理解題。根據(jù)“They grow together and they are less than 30 cm tall.”它們長(zhǎng)在一起，高度不足30厘米。根據(jù)“A snow lotus can be 15 to 35 cm tall.”一朵雪蓮有15到35厘米高。 根據(jù)“Most saxifrages are very small — less than 12 cm tall.”大多數(shù)虎耳草都很小——不到12厘米高。可知虎耳草是最小的植物。故選C。

【2】

細(xì)節(jié)理解題。根據(jù)“But they can be 3 meters wide.”但它們可以有3米寬�？芍獕|狀植物是可以長(zhǎng)到3米的寬帶，不是高度，故A項(xiàng)錯(cuò)誤；根據(jù)“Cushion plants keep the cold away.”墊狀植物防寒。且根據(jù)“In this way, cushion plants help other plants survive.”這樣，墊狀植物幫助其他植物生存。可知墊狀植物可以保護(hù)下面的植物不受凍。故B項(xiàng)正確；根據(jù)“They make the soil inside soft and wet”它們使里面的土壤又軟又濕�？芍獕|狀植物不是生長(zhǎng)在濕軟的土壤里。故C項(xiàng)錯(cuò)誤。故選B。

【3】

細(xì)節(jié)理解題。根據(jù)“A snow lotus can be 15 to 35 cm tall. People use it in medicine.”一朵雪蓮有15到35厘米高。人們?cè)卺t(yī)學(xué)上使用它�？芍�雪蓮是可以藥用。故選B。