正确答案: D

爱因斯坦

题目：11．20世纪初，提出光量子假说，解决经典物理学无法解释的光电效应问题的科学家是

解析：D

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举一反三的答案和解析：

[单选题]What does the text tell us about Fijian people ?

They stick to a traditional way of lift

[单选题]鄱阳湖冬、夏水面景象变化的原因是

湖底有线状洼地，水位季节差异明显

[单选题]Which of the following is TRUE according to Paragraph 3?（ ）

The author’s mother was not respected sometimes.

[单选题]24________

turned up

[单选题]苹果等梨果的食用部分主要来自( )。

花筒(托杯)

[单选题]If you have a job，_____ yourself to it and finally you’ll succeed．

do devote

[单选题]EAll too often , a choice that seems sustainable（可持续的）turns out on closer examination to be problematic. Probably the best example is the rush to produce ethanol（乙醇）for fuel from corn . Corn is a renewable resource —you can harvest it and grow more, almost limitlessly . So replacing gas with corn ethanol seems like a great idea .

The greater need for farmland.