A.









1.—How much are 2 hamburgers?
—It’s sixteen yuan.
2.—How much is a car?
—It’s nineteen yuan.
3.—How much are the ball and the boat?
—They are twenty-eight yuan.
4.—Is the robot hundred yuan?
—Yes, it is.
5.—How much are ten bananas?
—The bananas are twenty yuan.
6.—How much is a bike?
—Thirteen yuan, please.
7.—Are the ball and the doll forty yuan?
—No. They are 41 yuan.
8.—How much is the toy train?
—It’s forty yuan.
9.—How many boats are there?
—There is one.
10.—How much are the toy train and toy bike?
—They are seventy yuan.

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

