Long long ago, in England, there lived an earl(伯爵). His name was Sandwich. He liked to play cards very much. He played cards with his friends from day to night. He ordered his servants (仆人) to bring him some meat and bread. But when he ate, he had to stop playing cards. One day, he had a good idea. He put the meat between the two pieces of bread and held the food in his left hand. And he played cards with his right hand. People liked Sandwich's idea, more people ate the food. And they named the food sandwich.
1.The earl’s name was Sandwich. (____)2.The earl liked playing chess with his friends. (____)
3.Chinese invented(发明、创造) sandwich. (____)
4.The earl held the sandwich with two hands. (____)
5.More people like sandwiches. (____)
![](http://static.xuejinqu.com/images/y-prise.png)
同类型试题
![](http://static.xuejinqu.com/images/medal.png)
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
![](http://static.xuejinqu.com/images/avatar.png)
![](http://static.xuejinqu.com/images/avatar.png)
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
![](http://static.xuejinqu.com/images/avatar.png)
![](http://static.xuejinqu.com/images/avatar.png)