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【单选题】
Cu和Ni能形成置换固溶体,下列合金中硬度最大的是哪一个A.
Cu-20%Ni
B.
Cu-40%Ni
C.
Cu-50%Ni
D.
Cu-80%Ni
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知识点：
皮皮学刷刷变学霸
举一反三
【判断题】The Mississippi River Basin has become the “Barn of America” because of its largeness and rich soil.
A.
正确
B.
错误
【判断题】The"Barn of America"is located in what American politicians call “Middle America”.
A.
正确
B.
错误
【单选题】The common barn owl, one of ten species of barn owls found in North America, is also called the monkey-faced owl because its heart-shaped face looks ______ of a monkey.
A.
like much that
B.
like that much
C.
much like that
D.
that much like
【简答题】commitment
【判断题】The "Barn of American" is located in what American politicain call "Middle America".
A.
正确
B.
错误
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