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【单选题】
光源所发出的光通量和该光源所消耗的电功率的比值,称为:A.
照度
B.
色温
C.
发光效率
D.
亮度
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】A．She led her tribe to victory against the colonists B．She was considered to be extremely beautiful. C．She created popular American Indian art. D．She helped establish peace between her tribe and the c...
【单选题】德国古典哲学是马克思主义理论最直接的理论来源之一。其代表人物是
A.
乔•威•弗•黑格尔和路•费尔巴哈
B.
昂利•圣西门、沙尔•傅立叶和罗伯特•欧文
C.
康德、黑格尔
D.
威廉•配第、亚当•斯密和大卫•李嘉图
【单选题】德国古典哲学是马克思主义理论最直接的理论来源之一。其代表人物是
A.
乔•威•弗•黑格尔和路德维希·安德列斯·费尔巴哈
B.
威廉•配第、亚当•斯密和大卫•李嘉图
C.
昂利•圣西门、沙尔•傅立叶和罗伯特•欧文
D.
康德、黑格尔
【简答题】B Henrietta Swan Leavitt was born on July 4, 1869, in Massachusetts. Little is known about her private life. As a college student, she studied a number of subjects and fell in love with astronomy. Lea...
【判断题】Audrey Hepburn was considered a true angle in that she demonstrated the spirit of social responsibility and dedication.
A.
正确
B.
错误
【单选题】CO 2 对呼吸运动的调节作用主要是通过刺激( )
A.
主动脉体和颈动脉体化学感受器
B.
延髓化学感受器
C.
大脑皮层
D.
脑桥呼吸调整中枢
E.
脊髓呼吸调整中枢
【简答题】She was considered a great ______(beautiful) in her youth.
【简答题】It has taken 90 years since she was born in a poor house in County Limerick for a woman considered America’s oldest illegal immigrant to get her Irish passport.It will be a few more months before Jose...
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