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【多选题】
梁的破坏与纵向受拉钢筋配筋率ρ有关,根据ρ的不同,梁的破坏可分为()A.
少筋破坏
B.
超筋破坏
C.
适筋破坏
D.
等筋破坏
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【单选题】—Can you go swimming with us this afternoon? —Sorry. I ______ look after my little sister at home.
A.
can
B.
may
C.
would
D.
have to
【单选题】—Can you go swimming with us this afternoon? —Sorry. I ______ look after my little sister at home.
A.
have to
B.
can
C.
may
D.
would
【单选题】---Can you go swimming with us this afternoon? ---Sorry, I can't. I ______take care of my little sister at home.
A.
can
B.
may
C.
would
D.
have to
【简答题】Tea is a popular drink in China. Many people can’t live if they don’t have it. Chinese tea has a long history going back more than 5,000 years. A famous person over 1000 years ago wrote a book about h...
【单选题】Can you go swimming with us this afternoon? Sorry, I can't. I ______take care of my little sister at home because my mother is ill.
A.
can
B.
may
C.
would
D.
have to
【简答题】科学家艾弗里和他的同事们,通过著名的细菌转化实验,第一次证明了遗传物质是DNA。
【单选题】—can you go swimming with us this afternoon? —Sorry, I can't. I______ do the chores at home. [ ]
A.
can
B.
could
C.
can't
D.
have to
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