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A crater lake is at the tip of a________. 查看材料
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当前我国经济社会发展总体平稳，稳中有进。主要是指()。
[A]增速稳
[B]就业稳
[C]价格稳
[D]消费稳
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Have you ever heard of a flower whose seeds are carried and spread by elephants？ The rafflesia， a rare blossom， is very unusual. Found in the rain forests of Sumatra， the rafflesia is the world"s largest flower， measuring three feet in diameter!
This giant flower is a parasite——it needs another plant to live on. It lacks the structures needed to survive alone， The rafflesia has no stem or leaves. It is all flower. It attaches itself to the roots of other plants and sucks their juices. The flower"s favorite home is the root of the vine， which grows above ground.
The rafflesia seems to burst right out of the forest floor. Its blossom weighs fifteen pounds ! It has thick， spotted petals that give off a rotten smell. The center is about the size of a household bucket.
After a rain， it may hold up to twelve pints of water!
After the rafflesia dies， it becomes a pool of thick liquid in which its seeds float. Elephants wandering through the forest step into the mushy pool， and the seeds glue themselves to their feet. As the animals stomp through the forest， their sticky feet pick up twigs and leaves. The elephants try to rid themselves of the sticky mess， in the same way people try to get bubble gum off their shoes. The elephants rub their feet against the roots of the vine. In no time， seeds left on the vine grow into more monstrous flowers !
Elephants help to________. 查看材料
2017年供给侧结构性改革要深入推进“三去一降一补”。“一降”是指()。
[A]降成本
[B]降费用
[C]降要素
[D]降审批
南斯拉夫自治社会主义彻底摆脱了斯大林模式的束缚。
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