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| A. In many ball games, the most important person is the one who carries the ball. Such a person is the leader and he makes sure that a job gets done. B. Birds feed on worms. A bird will go hungry if it cannot catch worms. The bird that gets up early is sure to get some food, so the early bird catches the worm. C. Your feet become hot when you run. But when you are forced to sit in one place, your heels stay cool. When someone keeps you waiting, you can say he is cooling your heels. D. Some people seem to know what’s going on behind them, as if they had eyes in the back of their heads. “Eyes in the back of your head” describes the ability to notice everything happening around you. E. You don’t know what will happen if you wake up a sleeping dog in the street, so it would be much smarter to let sleeping dogs lie. F. People may get their feet into the water slowly when they start to lean swimming. “Get your feet wet” means trying to do something for the first time. G. Fish live in water. A person who is in a strange or uncomfortable environment may feel like a fish out of water. |
同类型试题
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
