Their appearance is therefore thought to mark an important moment in intellectual evolution.Trapped inside the Olduvai sand-stones, the researchers found distinctive but unusual biological molecules(分子) that are often interpreted as biomarkers for heat-tolerant bacteria. Some of these live in water ...
11. What did Mark find inside one of the books he bought? A. A plane ticket. B. A family photo. C. A post card. 12. Where does Mark live? A. Los Angeles. B. Chicago. C. Philadelphia. 13. What is the relationship between Mark and Ashley? A. Brother and sister. B. Husband ...
根据第一段Over the last one hundred years,the average(平均的)temperature on the Earth has gone up.在过去的一百年里,地球上的平均温度上升了,据此判断气温上升了,因此猜测划线单词的含义为度数。故选C。(2)A.段落大意题。根据第二段Why is it hot inside a greenhouse?Have you...
How global warming affects the jet stream's position is a case in point. However, human activities that release gases like carbon dioxide into the Earth's atmosphere are causing global temperatures to reach record highs. According to the European Union's Copernicus Climate ...
Once the energy is produced from nuclear fusion, it moves from the core to the surface. The radiation bounces around the convective zone surrounding the core, so the process takes about 170,000 years. Hot plasma inside the convective zone propels heat upward. After the energy escapes the conv...
Experiencing a black screen on your phone? Learn why is my phone screen black, what causes the black screen of death, and how to fix and prevent it easily.
How is it going? Hello, how are you doing? How is everything good morning, miss, how are you today? Nature. Good afternoon, MR is nice to meet you again. The poison. Couldn't be better. Not too bad. Busy as ever. So so. Great technique, wonderful, good. What's new with you...
Anyway, one thing on mine is I plan to visit Antarctica someday. It’s the coldest place on Earth. Everyone always says to me, “What can you do in Antarctica?” A lot, actually. You can see penguins and other animals. There are mountains, so you can also go skiing or hiking. ...
Earth's crust is the planet's outermost layer. It is made of solid rock and sits on top of another layer, called the mantle. The mantle flows and stretches like bubble gum, while the crust above it cracks like hard candy. When it does, it releases energy in a burst, which causes th...
28.(2020山西)7.This year marks Earth Day's 50th birthday. It was created to remind people to ___ the earth — the home to all the living things. A.talk about B.care about C.hear about 29.(2020山东菏泽)6.If buildings fall down with people inside,the snake robots can help___peopl...