Unit 3 Writing Workshop, Viewing（备作业）-【上好课】2021-2022学年高二英语同步备课系列（北师大版2019选择性必修第一册）

选择性必修第一册练习 　Unit 3　Part Ⅴ　Writing Workshop, Viewing Workshop & Reading Club Ⅰ.阅读理解 A Blood Falls are at the tip of a giant glacier in Antarctica. As its name suggests, the icy face of Blood Falls is red—but not from blood. Instead, the water gets its color because it's rich in iron. When the water comes out from its underground beginnings, the iron is exposed to the air and quickly forms the red rust. A scientist recently studied the rusty water and came up with some surprising results. The water that feeds Blood Falls probably comes from a salty underground lake. It's home to microbes that surprisingly don't need oxygen to survive. “This salty lake is a sort of time capsule，” said Jill Mikucki, who led the study. When she and her team studied the water, they found no oxygen but lots of iron. They suspected that the underwater lake formed when a giant glacier, now 1,300 feet thick, moved over the salty lake at least 1.5 million years ago. This trapped the water and everything in it in an oxygen­free environment. Unlike human beings and most other forms of life, the microbes from Blood Falls don't need oxygen to live. Instead, they are able to exist using the iron. The study gives us more information about our own planet. It may be useful in other scientific areas—like the search for life on other planets. If scientists find living things on the Earth that live on iron instead of oxygen, researchers might have a better idea of where to look for life elsewhere. 1．For what do Blood Falls get the name? A．They are rich in oxygen. B．They reflect their red surroundings. C．Their water rich in iron is red. D．They are composed of blood. 2．What probably made Jill Mikucki most surprised? A．The discovery of a salty underground lake. B．Microbes that don't need oxygen to survive. C．The movement of a giant glacier. D．The color of Blood Falls. 3．Why did Jill Mikucki believe this salty lake is a sort of time capsule? A．Because it was formed by a giant glacier. B．Because it could be