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【单选题】
无差异曲线上任意一点商品X和Y的边际替代率等于它们的( )。A.
价格之比
B.
数量之比
C.
边际效用之比
D.
边际成本之比
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【简答题】阅读理解。 Does reading really matter? Some people say that today, reading is not as important as it was. These days we have photographs, films, radio and television. Why read a description of something wh...
【单选题】杆件的受力和截面如图,下列说法中,正确的是
A.
σ 1 >σ 2 >σ 3 ;
B.
σ 2 >σ 3 >σ 1
C.
σ 3 >σ 1 >σ 2
D.
σ 2 >σ 1 >σ 3
【单选题】Reading is not the only way to gain knowledge of the work in the past. There is another large. reservoir which may be called experience, and the college students will find, that every craftsman (工匠) h...
A.
personal experience
B.
wild weeds among good plants
C.
the information from the parents
D.
the vast store of traditional practices
【简答题】A.B两家企业都是由个人以很少的资金创办的，在生产经营过程中企业逐渐扩大。 A企业的经营者仍沿用企业初创时期的组织机构形式及管理方法，并要求企业所有人员都直接向他汇报，事无巨细，一切都由 经营者进行决策和管理，结果导致企业内部管理混乱，发展停滞不前。B企业的经营者及时调整组织机构以适应企业的规模，并在企业内部建立一定的管理层次，制定一系列管理规范，同时从企业外部引进优秀的管理人员，最后企业继续高速...
【单选题】Reading is not the only way to gain knowledge of the work in the past. There is another large reservoir (知识库) which may be called experience, and the college student will find that every craftsman (工匠...
A.
personal experience
B.
wild weeds among good plants
C.
the information from the parents
D.
the vast store of traditional practices
【单选题】Reading is not the only way to gain knowledge of the work in the past. There is another large reservoir (知识库) which may be called experience, and the college student will find that every craftsman (工匠...
A.
personal experience
B.
wild weeds among good plants
C.
the information from the parents
D.
the vast store of traditional practices
【简答题】沈阳市某高中有高一学生600人，高二学生500人，高三学生550人，现对学生关于消防安全知识了解情况进行分层抽样调查，若抽取了一个容量为n的样本，其中高三学生有11人，则n的值等于（ ）。
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