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【单选题】
人体的下列血管中，其管内流动着动脉血的是（ ）A.
上腔静脉
B.
下腔静脉
C.
肺动脉
D.
肺静脉
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皮皮学刷刷变学霸
举一反三
【判断题】If ζ=1 , then the two roots will be ; the system is called critically damped; that means the two roots of the system are on the imaginary axis (As shown in figure).
A.
正确
B.
错误
【简答题】Bound morphemes contain two types: roots and a____.
【简答题】The two square roots of a positive number are 3x+3 and 5x+13,then this number is___. (英汉小词典:squareroot平方根;positivenumber正数)
【简答题】Can you find out the meaning of the following roots in English and give two of three words that contain each of them? 能否指出下列英语词根的含义并分别举出两三个包含这些词根的单词?
【简答题】List more than two roots that you know. And the words from these roots.
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