更多"Students learning about how life be"的相关试题:
[单项选择]Students learning English find the news a useful______of language practice. To improve their listening comprehension, they listen to the news on the radio and watch it on television.
A. resource
B. origin
C. source
D. illustration
[单项选择]Scientists believe that when life on earth began, the earth atmosphere consisted of ___________.
A. oxygen and nitrogen
B. hydrogen, oxygen and nitrogen
C. hydrogen and its compounds
D. hydrogen, oxygen and their compounds
[单项选择]The first-year students were learning from the army in Miyun, a suburb of Beijing near ______ I lived.
A. what
B. where
C. that
D. which
[单项选择]They first-year students were learning from the army in Miyun, a suburb of Beijing near ______ I lived.
A. what
B. where
C. that
D. which
[判断题]In order to keep students interested in learning English it is important to include a variety of activities and techniques in the lesson.（）
[单项选择]The theory about a Snowball Earth is significant in that it can _____________.
[单项选择]If you weigh (重)about 165 pounds, how long will it take you to bum 1500 calories every week by walking
[单项选择]For three quarters of its span on Earth, life evolved almost ______ as microorganisms.
A. precisely
B. instantly
C. initially
D. exclusively
[单项选择]______is not a novel about American Negro life.
[单项选择]How does everything living on earth live
A. Each plant can live alone.
B. Each animal can live alone.
C. Everything living on earth cannot live without needing other living things.
D. If living things want to live they must kill each other.
[单项选择]
Since life began eons ago, thousands of creatures have come and gone. Some, such as the dinosaurs, became extinct due to naturally changing ecologic conditions. More recent threats to life forms are humans and their activities. Man has drained marshes, burned prairies, dammed and diverted rivers. Some of the more recent casualties of man's expansion have been the dodo, great auk, passenger pigeon, Irish elk, and Steller's sea cow. Sadly, we can no longer attribute the increasing decline in our wild animals and plant species to "natural" processes. Many species are dying out because of exploitation, habitat alteration or destruction, pollution, or the introduction of new species of plants and animals to an area. As mandated by Congress, protecting endangered species, and restoring them to the point where their existence is no longer jeopardized, is the primary objective of the U.S. Fish and Wildlife Service's Endangered Species Program.
Which of the foll
A. Naturally changing ecological conditions.
B. Animals that have become extinct.
C. Achievements of the government Endangered Species Program.
D. Programs that have destroyed natural habitats.
