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【单选题】
3R原则不包括 （）。A.
减量化（ Reduce ）
B.
再利用（ Reuse ）
C.
再循环（ Recycle ）
D.
再加工 （ Reproduce ）
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【单选题】同温同压下，某容器充满O 2 重116g，若充满CO 2 重122g，现充满某气体重114g，则某气体的相对分子质量为 [ ]
A.
16
B.
60
C.
28
D.
4
【单选题】Differentiation strategy is a way for a business to differentiate itself from the competition. If successful, it allows the business the opportunity to charge a premium for the good or service. What d...
A.
A sum of money that customers have to pay for the normal cost and profit margin.
B.
A sum of money that customers have to pay for the normal cost.
C.
A sum of money that customers have to pay for the production cost.
D.
A sum of money that customers have to pay for something in addition to the normal cost.
【单选题】If a firm is the only producer of a good or service, it is a(n) ________.
A.
unsuccessful organization
B.
oligopoly
C.
monopoly
D.
competitive participant
【单选题】Perfect competition arises if the ________ efficient scale of a single producer is ________ relative to the demand for the good or service.
A.
minimum; small
B.
minimum; large
C.
maximum; small
D.
maximum; large
【单选题】同温同压下，某容器充满O 2 重116 g，充满CO 2 重122 g，现充满某气体重114 g，则该气体的相对分子质量为 [ ]
A.
28
B.
60
C.
32
D.
44
【单选题】同温同压下，某容器充满O 2 重116g，若充满CO 2 重122g，现充满某气体重114g，则某气体的相对分子质量为 [ ]
A.
28
B.
60
C.
32
D.
4
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