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A: Hi, Bill. You were not at school yesterday.1．
B: Oh, I fell off my bike on my way to school and hurt my leg.
A: I'm sorry to hear that.2．
B: No, my father took me to the hospital.3．
A: We should be more careful when we ride. In fact, we should never ride too fast.
B: You are right.4． If we break the rules, we may be in danger.
A: Let's go to the traffic station to learn more rules.
B:5．
| A．Was it serious? |
| B．That's a good idea. |
| C．What was the matter? |
| D．We should learn more about the traffic rules. |
| E．The doctor checked it over and sail it was nothing serious. |
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
