搜索
What is a tsunami（海啸）? Tsunamis are often caused by earthquakes or volcanoes（火山）. The average speed（平均速度）of the waves（波浪）is 300 mph and the waves can last from five minutes to an hour.
What to do in a tsunami?
Firstly, when a strong earthquake is felt, leave the water at once, get to the shore（海岸）and go as far away as you can from the beach fast. If it allows, go to a higher ground.
Secondly, turn on the TV for news and weather report. They will tell you more about the tsunami.
Thirdly, get all members of your family together and let everyone know the tsunami is coming. Choose a place to stay together. Make sure the place is safe and as far away from the shore as possible. Bring emergency supplies（应急用品）when you have to leave your house.
At last, if you find a huge wave is coming, climb onto the roof of your house or on the highest point of the nearest building. Hold on to anything that’s strong enough. Climb a tree if you have to.
For a tsunami, the only way to survive（幸免于）it is to be prepared.
1．When a tsunami comes, the waves will ________.| A．go as quickly as 300 mph | B．become stronger before the earthquake |
| C．cause heavy rain | D．last shorter and shorter |
| A．Two. | B．Three. | C．Four. | D．Five. |
| A．go to the beach together | B．stay in a safe place together |
| C．stay in your house | D．put emergency supplies on a lower ground |
| A．listening to the weather report | B．going to a low place to keep safe |
| C．getting emergency supplies ready | D．leaving the water as far away as you can |
| A．How to keep safe in the water | B．What a tsunami is |
| C．What to do after a tsunami | D．How to survive a tsunami |
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
