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【单选题】

"A rolling stone gathers no moss(苔藓) ," but there is one living animal that does gather moss, the three-toed sloth (树獭) of South America. This slowest-moving member of the animal kingdom is so inactive that moss actually gathers on its body and turns it green——strange as it seems!
Most of the sloth’s life is spent motionless, hanging upside down from a limb. And that is the way its hair grows. Long and coarse, the strands (串) from receptacles (花托) for the damp jungle algae (水藻) that turn the brown fur a mossy green. Actually this moss helps the animal survive because it serves as a perfect camouflage against the leaf trees and hides the sloth from the jungle’s swift - moving hunters. The sloth would have little chance of survival on the ground. With long, curved claws hooked over the limb of a leafy tree, it spends the long hot hours during the day drowsing and eating. Inch by inch, it strips the leafy limbs bare and crawls slowly down the trunk to find a new dining spot, but only at night.
In addition to looking rather like a vegetable, the sloth is a strict vegetarian. Running out of its favorite leaf is about the only thing that will make a sloth move. Then its appetite may even force the animal into swimming a stream to reach a juicy succulent(多汁的植物). It will also force it into fighting to keep the tree all to itself. The sloth is lazy and prefers to be alone, but it will tolerate its own relatives!
The author’s purpose in writing the passage is ______.

A.
to help children to gain a better understanding of animal life
B.
to prove that the saying "a rolling stone gathers no moss" is wrong
C.
to introduce a particular animal to the common reader
D.
to discuss with professionals the laziness of animals
题目标签:花托树獭植物
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举一反三

【单选题】下列选项中植物姿态不同的一组是()。

A.
香樟、广玉兰、鹅掌楸
B.
栾树、黄连木、金枝干头柏
C.
蜡梅、紫荆、金钟花
D.
中华绣线菊、云南黄馨、粉花绣线菊

【单选题】请选出1种观果植物( )。

A.
佛手
B.
油茶花
C.
高山榕
D.
假槟榔

【单选题】下列特征中,为大戟科植物普遍具有的是()。

A.
对生、边脉
B.
乳汁、腺体
C.
边脉、托叶环痕
D.
透明油点、芳香气味