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【单选题】
Which of the following alternative explanations of the change in the cash value of children would be most likely to be put forward by sociological economists as they are described in the passage?A.
The cash value of children rose during the nineteenth century because parents began to increase their emotional investment in the upbringing of their children.
B.
The cash value of children rose during the nineteenth century because their expected earnings over the course of a lifetime increased greatly.
C.
The cash value of children rose during the nineteenth century because the spread of humanitarian ideals resulted in a wholesale reappraisal of the worth of an individual
D.
The cash value of children rose during the nineteenth century because compulsory education laws reduced the supply, and thus raised the costs, of available child labor.
E.
The cash value of children rose during the nineteenth century because of changes in the way negligence law assessed damages in accidental-death cases.
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皮皮学刷刷变学霸
举一反三
【单选题】电针治疗仪的使用哪项是错误的（）。
A.
将电针每对输出电极接在两根毫针上
B.
将同一对输出电极连在身体的同侧
C.
胸背部使用电针时，可将两个电极连在身体两侧
D.
使用前先把强度调节旋钮调至为零
E.
通电时逐渐加大电流强度
【简答题】请列举本课程可能采用的教学方法。