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【单选题】
下列物质中,只含有共价键的化合物是( )。A.
Na
B.
N 2
C.
CO 2
D.
KCl
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反馈参考答案：
举一反三
【单选题】在 172.16.8.159 /26 255.255.255.192 这个网络里,广播地址是
A.
172.16.255.255
B.
172.16.8.127
C.
172.16.8.191
D.
172.16.8.255
【简答题】在△ABC中，角A，B，C的对边分别为a，b，c，AH为BC边上的高，在以下结论中： ① AH ?( AB + BC )= AH ? AB ； ② AH ? AC = AH 2 ； ③ AC ? AH | AH | =c?sinB ； ④ BC ?( AC - AB )= b 2 + c 2 -2bc?cosA ． 其中正确结论的序号是______．
【简答题】设(AH)=80H，执行指令SAR AH，1后，(AH)=______。
【简答题】在172.16.8.159/26这个网络里,广播地址为( )
【简答题】Because of the greater pressure, the underground water shoots out of the suce __________________(以蒸汽和热水的形式).
【单选题】The second half of his voyage was by far the more dangerous part ______ he sailed round the treacherous Cape Horn.
A.
where
B.
of which
C.
during which
D.
that
【单选题】If the officer of the watch must leave the voyage plan, he should _____?
A.
Make a note in the logbook
B.
Inform the mater
C.
No special action necessary
D.
Check the new plan
【单选题】The voyage charter means that th e vessel is put at the disposal of the charterer for a certain period employment without any crew．( )
A.
正确
B.
错误
【简答题】Eats, Shoots and Leaves is not the type of book it claims to be.
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