老年人痛觉降低的主要原因有()
A.躯体痛觉阈值增高
B.躯体痛觉阈值减低
C.皮肤痛觉小体减少
D.阿片受体增加
E.阿片受体减少
参考答案:A, C, E
22. We had ______ great fun watching the performance, which was ____ entire success.
A. a; an B, a; the C. /; an D. a; /
康德认为道德行为的特点是()
A、自觉性
B、整体的统一性
C、可普遍化
D、利他