【单选题】【消耗次数：1】
Every means _______ been tried to solve the difficult problem.
①
has
②
have
③
is
④
are
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相关题目
【判断题】
The teachers tried to __convince____ these students that they could solve the complicated problem, however, they just didn’t see the point.
①
正确
②
错误
【单选题】
The ____ problem of bring a spaceship back from the moon has been solved.
①
technical
②
technological
③
technique
④
technology
【单选题】
The _____problem of bringing a spaceship back from the moon has been solved.
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technical
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【单选题】
I hope ___ the little ___ I have been able to do has been of some use.
①
that; that
②
/; by which?
③
what; what
④
/; with which
【判断题】
判断线上的内容是否正确：The teachers tried to __convince____ these students that they could solve the complicated problem, however, they just didn’t see the point.
①
正确
②
错误
【单选题】
What do you think _____solve the problem ?
①
you can do
②
can you do
③
you can do to
④
can you do to
【单选题】
It suddenly ________ him that he should solve the problem with a computer.
①
occurred to
②
struck at
③
hit on
④
dawned in
【判断题】
The past 22 years have really been amazing， and every prediction we’ve made about improvements have al come __true__
①
正确
②
错误
【单选题】
This book has been in the works so long that I have lost _____of most of the sources found for me by the staff of the library.
①
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随机题目
【单选题】
（ ），IBM公司的约瑟夫·奥利佛博士提出把对物料的需求分为独立需求和相关需求，推动了物料需求计划理论的产生。
①
20世纪40年代
②
20世纪50年代
③
20世纪60年代
④
20世纪70年代