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【单选题】
Abe starts exercising regularly, and after a few months discovers he can now do twice as much of everything—in a single day Abe can now make 10 hamburgers or 8 milkshakes, rather than the 5 hamburgers and 4 milkshakes he made in the past. We now know that Abe's production possibility frontier:A.
. has shifted right, but his opportunity costs of making milkshakes are unchanged.
B.
. has shifted right, but his opportunity costs of making milkshakes have decreased.
C.
. has not changed, but his opportunity costs of making milkshakes have increased.
D.
. has not changed, but his opportunity costs of making milkshakes have decreased.
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举一反三
【多选题】下列属于开放性问题的是
A.
您公司曾经买过我们公司的产品吗?
B.
您能讲一下现在您公司发展的计划吗?
C.
您能描述一下您公司对于IT产品都有哪些需求吗?
D.
您对要买的产品要哪些希望呢?
【单选题】某同学进行差减称量法称取0.3~0.4g的碳酸钠,先称出装有碳酸纳的称量瓶质量为28.4667g,接着进行差减法操作,当显示屏出现以下哪个示数时,说明称量质量准确?
A.
27.9432 g
B.
28.1105 g
C.
28.2302 g
D.
28.0104 g
【单选题】某同学进行差减称量法称取0.3~0.4g的碳酸钠,先称出装有碳酸纳的称量瓶质量为28.4667g,接着进行差减法倾样操作,当显示屏出现以下哪个示数时,说明称量质量准确?
A.
27.9432 g
B.
28.1105 g
C.
28.2302 g
D.
28.0104 g
【简答题】简要阐述计算机系统的组成。
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