It was January. The weather was very cold and the ground was hard (硬的) with cold. Jill and her brother were wearing their warm clothes and taking a
“Poor little birds,” said Jill. “They must be hungry. The ground is so hard. I don’t think they can find
“Let’s do something for them!” her brother said.
“Let’s make a house for them and give
The two children ran back to their house. They found a wooden (木的) box and cut a hole in it. Then they put the box in the tree in the park. And they put some bread in the box.
The birds soon found the bread and
A.walk | B.bath | C.seat |
A.their parents | B.food | C.water |
A.something | B.anything | C.nothing |
A.they | B.them | C.their |
A.come | B.coming | C.came |
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