dangerous for ground water. Any pipeline leakage (泄露) would pollute the ground water and put people ……

”, is a recurrent phenomenon that occurs when the level of water in the Venice lagoon overflows ground level in Venice. Although the “acqua alta” could be dangerous, a large number of tourists think ……

the ground with a bigtrident (三叉戟). Then the sea became too dangerous for sailors.Poseidon and Athena... could have it.Poseidon threw his trident in the ground and made aspring(泉水). But the water was salty ……

from 0 to 9. Generally, earthquakes over size 4 are dangerous.People can feel it. Tables, beds and pictures may move.The ground cracks (裂开). Buildings fall down. Bridges break.Cities can be destroyed ……

head with your arms. Avoid dangerous places near windows, hanging objects or mirrors.If you take... the position until the ground stops shaking and it is safe to move.21st ……

with your arms. Avoid dangerous places near windows, hanging objects or mirrors.If you take cover under... until the ground stops shaking and it is safe to move.21st ……

home. Their village is on top of the cliff and 800 meters above the ground (地面). The trip takes over one hour and is very dangerous. The government (政府) said they would build a steel (钢铁的) ladder soon ……

. This may even cause the ground to crack (开裂), leaving people who live and work above in dangerous... cause the ground to crack (开裂), leaving people who live and work above in dangerous situations ……

in the ground in front of your house. Sound crazy? Well, this is exactly what happened to some people in Schmalkalden, Germany last week.A large hole opened up in the ground in the middle of town ……

are dangerous. They can make us sick.Don’t worry too muchA healthy person needs to come into contact with thousands of bacteria to become sick.Bacteria usually stay on the ground. But most of us don’t spend ……

, US.The woman touched a wasp’s nest (巢) on the ground. A group of wasps flew out and stung the woman... hurts a lot and is very dangerous. It’s not easy to make wasps go away if they try to sting you ……

, but not everyone takes it seriously. The rule states that food dropped on the ground will not be too dangerous to eat as long as it is picked up and eaten within five seconds. Now, scientists from ……

houseworkB. work in dangerous places for humansC. help people work in nuclear power plantsD. show ……

lower than 50 meters above the ground for a distance of 300 or 350 meters before hovering (盘旋) over... on guiding signals from the ground. As the website of the British Helicopter Advisory Board explains ……

This is a way to see what happens to the ground in an earthquake. ……