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【单选题】
大气中，云层能获奖太阳辐射中一部分能量发射回宇宙空中，其中云反射作用最为显著，一般情况下，云的平均反射率为（）。
A.
30%-35%
B.
40%-45%
C.
50%-55%
D.
60%-65%
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】物理治疗的神经反射作用为（）
A.
无条件反射
B.
条件反射
C.
先是无条件反射，后出现条件反射
D.
先是条件反射，后出现无条件反射
E.
条件反射与无条件反射同时出现
【单选题】Psychology is the study of the mind and mental activities. For example, psychologists are interested in why some things make you sad, but others make you happy. They want to know why some people are s...
A.
study physical diseases as well
B.
deal with animals more often than with people
C.
are not medical doctors
D.
are interested in things that make you sad