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【判断题】
( )型号为*-*MR的PLC,其中M表示基本单元,R表示输出类型为继电器输出。A.
正确
B.
错误
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举一反三
【判断题】In a normal state, arteries are elastic tubes that recoil and carry blood in pulsating waves, known as the pulse.
A.
正确
B.
错误
【单选题】Arteries carry blood _______.
A.
towards the heart
B.
away from the heart
C.
towards the lungs
D.
away from the right atrium
【判断题】There are three types of vessels, each with a specific function. Veins take blood from the heart, arteries carry blood back to the heart, and capillaries connect arteries and veins. Capill aries are t...
A.
正确
B.
错误
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