解析 B。解析:这是一个表语从句。从句“lightning is much hotter than the sun”是一个完整的陈述事实的句子,不缺成分,所以用that引导表语从句。which在表语从句中充当成分,这里不合适;what要在从句中充当一定成分,不符合题意;whether表示“是否”,这里不是表示疑问,不选。
In less than a second, lightning can reach a temperature of 28,000C, which is hotter than the sun.In Americ a. about 100 people are killed by lightning each year. Lightning bolts are actually more dangerous than tornadoes or hurricanes.It is true that your chance of being struck by ...
Lightning is 5 times hotter than the sun! A bolt of lightning can reach a temperature of 53,540 °F as compared to just 10,340 °F of the sun. More facts!
Lightning is a discharge of 100 MV, an intensity of 30 KA and a temperaure of 27,000°C, hotter than the surface of the sun. As there are 100 of them per second, the energy of lightning has an enormous planetary potential. The instant equivalent of a nuclear power plant with four ph...
Lightning is one of the most beautiful natural phenomena(现象).It is also one of the most deadly phenomena. A bolt of lightning is six times hotter than the surface(表面)of the Sun and gives out 30,000 amps of electricity(电).It can travel at 100, 000 kilometres per hour and has the...
A.a light rain B.a white cloud C.a small cloud D.lightning 52.The streets are like swimming pools because___. A.the cloud is large and dark B.the sky gets dark C.it rains hard D.it's a hotter summer day 53.What does the underlined word “flash〞 mean? A.闪光 B.明亮 C...
Hotter temperatures and drier forests are helping to cause wildfires. The fires start from natural causes, like lightning. Humans can start fires with cigarettes or campfires, accidentally.(部分原因是由于气候变化。更高的温度和更干燥的森林导致了火灾。火灾是由自然原因引起的,比如闪电。人类可能会意外地...
DETROIT (FOX2)-Do you remember as a child looking up at the sky with wonder as lightning streaked overhead? You were watching the raw power of nature. One stroke of lightning can heat the air around it to 54,000F! That’s more than 5 times hotter than the...
Many of these fires were sparked by lightning, but the situation isn’t natural: Wildfires are increasing as climate change makes the West hotter and drier. (Insects that thrive in heat have also killed hundreds of millions of trees in forests, turning them into fuel.) The average size of ...
Elmo's Fire is about electrons. So, what is St. Elmo's Fire if it's not a form of lightning? Find out in the next section. Causes of St. Elmo's Fire: The Fire That's Not a Fire Like St. Elmo's Fire, neon tubes glow with the light of a sustained spark. Al ...