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【简答题】
什么是本征半导体?什么是杂质半导体?各有什么特征?
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反馈参考答案：
举一反三
【单选题】现场救护局部伤口处理正确的是 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
无菌纱布覆盖
B.
B ．内脏、组织等纳回伤口
C.
C ．清除伤口异物
D.
D ．清除血凝块 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
E.
外露的骨折端归位 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
【单选题】Which of the following statements about the marginal rate of substitution is NOT correct?
A.
It measures the number of units of the good on the horizontal axis that a consumer must be compensated with to give up a unit of the good on the vertical axis, while remaining on the same indifference curve.
B.
It is measured by the slope of the indifference curve.
C.
It decreases in value when moving downward along a typical-shaped indifference curve.
D.
It is constant for goods that are perfect substitutes.
【单选题】现场救护局部伤口处理正确的是
A.
无菌纱布覆盖
B.
内脏、组织等回纳伤口 prefix="o" ns="urn:schemas-microsoft-com:office:office"? ?xml:namespace>
C.
清除伤口异物 prefix="o" ns="urn:schemas-microsoft-com:office:office"? ?xml:namespace>
D.
清除血凝块
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