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Japan started sending nuclear-contaminated water(核污染水) into the ocean on Aug 24h. The world is worried about it.
| What happened? | Two types of water |
| In 2011, a tsunami(海啸) hit a nuclear power plant(核电站) in Japan. The nuclear reactors(核反应堆)were damaged. They were very hot. Workers used a lot of water to keep them cool. The water then became nuclear-contaminated water. | Nuclear-contaminated water: The water has more than 60 kinds of radioactive materials (放射性物质). It’s bad for people’s health and the environment. Nuclear wastewater(核废水): The water doesn’t have radioactive materials. It also cools down reactors, but it doesn’t touch them. |
| Where will Japan’s nuclear-contaminated water go? | How does it hurt us? |
| It goes to the middle of the Pacific Ocean in 57 days; It gets to China in about 240 days; It gets to the US and Canada in 3 years: It reaches everywhere in the world in 10 years. | By food: Fish and other seafood in the sea may have radioactive materials. By air: The cloud near the sea may have these materials too. |
1．Japan’s nuclear-contaminated water gets to China in about ________?
| A．3 months. | B．3 years. | C．8 months. | D．10 years. |
| A．A tsunami hit a nuclear power plant in Japan in 2021. |
| B．Nuclear-contaminated water is good for people’s health and the environment. |
| C．It may not safe to eat fish or other seafood in the sea. |
| D．Nuclear-contaminated water and nuclear wastewater are the same. |
| A．Family. | B．Advertisement. | C．Science. | D．Environment. |
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
