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【多选题】
光纤的优点有?A.
通信容量非常大。
B.
传输损耗小，中继距离长。
C.
抗雷电和电磁干扰性能好。
D.
无串音干扰，保密性好。
E.
体积小，重量轻。
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【单选题】Would you ______ 200yuan ______ a new coat? [ ]
A.
cost, to
B.
spend, in
C.
spend, on
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【简答题】极感 兴趣的;全神贯注的;专注的 a.
【简答题】全神贯注的
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【简答题】a. 极感兴趣的;全神贯注的;专注的
【单选题】—Do you always spend lots of time playing computer games? —No, but I spend much time my homework. [ ]
A.
on; in
B.
on; on
C.
in; on
D.
in; in
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