【单选题】【消耗次数：1】
Ill finish my adult education courses_________ two years.
①
in
②
on
③
until
④
by
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相关题目
【多选题】
This is the_________ motivating force behind the development of adult education.
①
main
②
major
③
many
④
much
【单选题】
Thats the main reason_________ the development of adult education.
①
as
②
why
③
for
④
across
【单选题】
My grandfather had suffered from cancer for two years. It was no surprise when I was told that he had _____.
①
passed off
②
passed away
③
passed by
④
passed over
【单选题】
The lives of many people have been enriched_________ adult education.
①
because
②
because of
③
as a result
④
so that
【多选题】
The lives of many people have been enriched_________ adult education.
①
because
②
because of
③
due to
④
owing to
【单选题】
Employment _______ in the past two years.
①
has gone up rapidly
②
went up rapidly
③
has risen steady
【单选题】
Not until three years ago _____ to work outside.
①
he began
②
he begins
③
began he
④
did he begin
【单选题】
The Chinese （ ） paper for two thousand years.
①
have made
②
have been making
③
had made
④
are being made
随机题目
【判断题】
等距随机取样法是先将总体各单位按某一标志顺序编号并排列，再用总体N除以样本容量n，求得抽样间隔，然后在第一个抽样间隔内随机抽取一个作为第一次抽样，并按抽样距离作等距抽样，连续抽样直至满足抽样容量。等距随机取样法比简单随机取样法更简便，它能在总体的整个范围内有系统地抽取样本，因此，一般情况，其样本更为准确、抽样误差比简单随机取样误差小。但是，如果总体中存在周期性的波动或变化，系统取样所得的样本就可能出现系统偏差。( )
①
正确
②
错误
【判断题】
研究文献并不与文献中记载的人与事实直接接触，文献法属于非接触性的研究方法。利用科学文献是实现利用“前人劳动成果”的重要措施和方法，也是促进和实现“今人的协作”的条件和基础( )。
①
正确
②
错误