A.内部物流
B.外部物流
C.合同物流
D.外协物流
第1题
The movement of breathing can effectively_________
A. help the exchange of oxygen and carbon dioxide in the lungs
B. prevent the inhaling of excessive carbon dioxide
C. keep the regular circulation of blood
D. strengthen the function of breathing muscles
第3题
Almost ______ substances expand in volume when heated and contract when cooled.
A.all
B.they all
C.all of
D.all are
第4题
Metals expand when they are heated and _______ when cooled.
A、indicate
B、eliminate
C、conquer
D、contract
第5题
A.contact
B.contract
C.contrast
D.contradict
第7题
第8题
A.reality
B.truth
C.case
D.matter
第9题
A.Because it makes us easy to bend down.
B.Because the hands muscles are stronger.
C.Because the other muscles can help the lower back muscles.
D.Because the other muscles can help the arm muscles.
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