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【单选题】
下列选项中属于库伦土压力理论的基本假设的是( )。A.
墙后填土水平
B.
墙后填土为无黏性土
C.
墙背直立
D.
墙背光滑
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【单选题】The lions in the Gir Forest are especially vulnerable to disease because______.
A.
they have descended from a dozen or so ancestors
B.
they are smaller than the African lions
C.
they do not have enough to eat
D.
they are physically weaker than the African lions
【简答题】CIF Liner terms
【简答题】CFR Liner Terms
【单选题】The lions in the Gir Forest are especially vulnerable to disease because they______.
A.
have descended from a dozen or so ancestors
B.
are smaller than the African lions
C.
do not have enough to eat
D.
are physically weaker than the African lions
【单选题】The gir is smart and clever; __________.
A.
so is her brother
B.
so does her brother
C.
so his brother does
D.
so his brother is
【简答题】数据传输过程出现错误如何发现?发现后如何处理?
【简答题】发送的数据为1010001101,6位生成多项式为110101,则发送端在数据位后面补齐5位0,即101000110100000,然后用生成多项式整除得到5位余数为01110,然后将余数作为校验码附加到数据位的后面得到101000110101110,发给接收端,如果传输中间无错误,接收端用同样的生成多项式,整除接收到数据和校验码的余数为0,说明接收数据正确。假定数据帧101000110101110...
【单选题】The lions in the Gir Forest are especially vulnerable to disease because they ______.
A.
have descended from a dozen or so ancestors
B.
are smaller than the African lions
C.
do not have enough to cat
D.
are physically weaker than the African lions
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