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【简答题】
Part Two : Interpreting the Text Each of the following sentences could have been used in the text. Indicate in the text where each sentence would have been placed if it had been included. 1. He had never really recovered from her death. 2. He died before he could tell me what he meant by these words. 3. Suddenly, he knew what the man had come to tell them. 4. I ’ m so sorry, Thomas.
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【判断题】金属受到污染后可能引起加工时出现脆性或裂纹,在回用料、焊料中带入微量的铅就会使合金材料受到污染,其它的脆性污染物包括硅、硫和其它低熔点金属,要注意回用料的管理,成分不明确的材料不能随便使用,要先进行分析,检查有无这样的杂质。
A.
正确
B.
错误
【单选题】听力原文： The home is the central focus of most young people's lives in Britain, particularly for those who are still attending school. The majority rely upon their home environment as a place of security...
A.
At school.
B.
At home.
C.
At Youth Clubs.
D.
At Youth Centers.
【简答题】金属材料包括铁、铜、铝等纯金属和合金。 ( 1 )因性能优良,被认为 21 世纪的重要金属材料的是 及其合金(填单质名称); ( 2 )铝具有较好的抗腐蚀性能,是因为铝与空气中氧气反应,其表面生成一层致密的氧化膜,则生成该氧化膜的化学方程式为 ; ( 3 )现代以来,人们对金属的认识不断深入,助推多种新材料的研制与使用。飞机的制造中会使用很多新材料,其中有锂铝合金,在飞机制造中使用该材料不能说明其...
【简答题】金属材料的性能包括使用性能和 性能。其中使用性能包括 性能、 性能和 性能。
【单选题】Areas where students have particular difficulty________ have been treated particular care.
A.
by
B.
in
C.
under
D.
with
【简答题】 The qualities that truly ___ Winston Churchill _____ were his determination and his ability to inspire others.
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