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【单选题】
以氧化铁为氧化剂,以铝粉为还原剂的一种热剂焊是( )A.
. 闪光焊
B.
气压焊
C.
铝热焊
D.
电阻焊
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反馈参考答案：
举一反三
【单选题】Smith was born ________ December, 1950. He works ________ a farm.
A.
on; in
B.
in; on
C.
in; at
D.
on; on
【单选题】Mr.Smith was born ____and died_____
A.
in the 1985s;in his eighties
B.
in 1985's;in his eighty
C.
in the 1985's;in his eighty
D.
in the 1985's;in his eighties
【简答题】Frederick W. Smith is the founder of the FedEx Corp., the largest and most successful overnight delivery service in the world. He is widely recognized as an outstanding entrepreneur with a(n) _______ ...
【简答题】听录音，判断下列图片正(√)误(×)。 ( ) ( ) ( ) ( ) ( )
【多选题】氟离子选择性电极膜电位的产生是由于:
A.
F - 在溶液和晶体膜中的交换和扩散；
B.
F - 进入 LaF 3 晶格空穴；
C.
OH - 在溶液和晶体膜中的交换和扩散；
D.
F - 在电极表面被氧化。
【判断题】Fred W. Smith was born into a poor family and started his business from scratch.
A.
正确
B.
错误
【判断题】As the founder of FedEx, Fred Smith was born in a well-off family andhada happy childhood.
A.
正确
B.
错误
【简答题】In the sentence “Frederick Wallace Smith was born into a wealthy family clan on August 11, 1944 in Mississippi” , the s ignal words of time are ____________ .
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