成人高考考试

根据网考网考试中心的统计分析，以下试题在2018/9/9日成人高考高起点习题练习中，答错率较高，为：81%
【单选题】The reason why all the solar energy falling on the earth can’t be utilized is that ______.
only a very small part is available the sun is too distant from the earth
it takes thousands of years for this energy to be stored up in coal and oil
our scientific knowledge is not sufficient
网考网参考答案：D，答错率：81%
试题解析：
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