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【简答题】
承受门窗洞口上部的荷载，并把它们传递到门窗两侧的墙体的构件是（）。
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皮皮学刷刷变学霸
举一反三
【单选题】The library _____ in the 1980s is taking on a new look after the restoration. [ ]
A.
to build
B.
to be built
C.
building
D.
built
【单选题】The Library of Congress receives copies of every book copyrighted in the U.S.
A.
opinion
B.
fact
【判断题】SQuire Rushnell discovered a book on John Adams and Thomas Jefferson in his own bookshelves that was available in only one public library in the Eastern U.S., the Library of Congress.
A.
正确
B.
错误
【简答题】质粒载体与目的基因的连接方式有 、 l两种主要方式。
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