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【单选题】
英国近年来由于在邮政技术上的发展投入巨资，所以目前信函的80%都是由机器处理的，这样虽然业务猛增，但劳动力反而下降了，每个邮政工人每年可处理邮件平均高达20万件，占世界第一位，服务水平也提高了，最突出的是邮政的时限标准大大提高，经济效益也很明显。信函每千件的处理成本由25美元降至17美元，投资年回收率达48.5%。近两年我国也有二十多个城市从比利时引进了自动信函分拣机，大大提高了我国的信函分拣效率。 信函处理设备出口的重要国家有（ ）。A.
澳大利亚、丹麦、瑞典
B.
日本、德国、法国
C.
美国、加拿大、瑞典
D.
俄罗斯、美国、加拿大
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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
【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
【简答题】all( )
【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】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...
【简答题】温度测量仪表可分为（）测温仪表和（）测温仪表两大类。
【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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