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【多选题】
How does blood transport oxygen, metabolites, and hormones?A.
Blood mediates the metabolic interactions among all tissues.
B.
It transports nutrients from the small intestine to the liver and from the liver and adipose tissue to other organs; it also transports waste products from extrahepatic tissues to the liver for processing and to the kidneys for excretion.
C.
Oxygen moves in the bloodstream from the lungs to the tissues, and CO 2 generated by tissue respiration returns via the bloodstream to the lungs for exhalation.
D.
Blood also carries hormonal signals from one tissue to another. In its role as signal carrier, the circulatory system resembles the nervous system: both regulate and integrate the activities of different organs.
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举一反三
【单选题】There isn’t a teacher in the classroom and all the students are talking. So the classroom is ________.
A.
quiet
B.
strict
C.
noisy
【单选题】There is a blackboard _______ the classroom and another one _______ the classroom.of [ ]
A.
in the front of, at the back of
B.
in the front of, at back of
C.
in front of, at the back of
D.
in front of, at back
【单选题】When the teacher came into the classroom, she was not ________ because the classroom was not as ________ as ________. [ ]
A.
pleased; clean; usually
B.
angry; cleaning; usual
C.
pleased; clean; usual
D.
happy; clean; usually
【单选题】According to the speaker Liu Yuhan, which one does she prefer, the traditional classroom or the online classroom?
A.
traditional classroom
B.
online classroom
【单选题】_____the bedroom need to be cleaned. A. Either the classroom or B. Neither the classroom nor C. Both the classroom and D. Both the classroom and
A.
Either the classroom or
B.
Neither the classroom nor
C.
Both the classroom and
D.
Not only classroom but also
【简答题】The traditional classroom and the IITV classroom are______.
【单选题】听力原文： We hear it a lot in the news these days: 'Recycle newspapers and save a tree. Collect bottles and calls so they can be reused in the manufacturing of new products.' Protecting our delicate envir...
A.
Important Keys to Recycling Paper.
B.
Technological Advances Improve Recycling.
C.
Steps to Improve Recycling.
D.
A Greater Demand for Improving Recycling.
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