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【多选题】
河流阶地的形成可能是因为A.
地壳上升，河流下切
B.
地壳下降，河床堆积
C.
地壳稳定，河流侧蚀
D.
河的侵蚀和沉积共同作用
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【单选题】下面关于无线个人局域网技术说明错误的是()。
A.
IEEE 802.15.1是红外传输技术协议。
B.
IEEE 802.15.4 是针对低速个域网物理层和MAC 层制定的标准。
C.
IEEE 802.15.3 是针对超宽带个域网物联层和MAC 层制定的标准，其宽带约为100MPS。
D.
IEEE 802.15 的一系列协议是针对无线个人局域网行为的范围。
【单选题】One way to avoid being stuck in the different options to solve the problem is to______ .
A.
stick to the best option
B.
compare the advantages and disadvantages of different options
C.
ask other people for advice
D.
try the best option but be ready to abandon it once it turns out to be not good
【单选题】The best way for a driver to avoid car theft is ______
A.
leaving documents showing one's home address in the car
B.
locking one's car in a parking lot at any time
C.
not leaving the car unattended for longer than necessary
D.
not leaving a sunroof or window partially open
【单选题】下面关于无线个人局域网技术说明错误的是（）。
A.
IEEE802.15.1是红外传输技术协议
B.
IEEE802.15.4是针对低速个域网物理层和MAC层制定的标准
C.
IEEE802.15.3是针对超宽带个域网物联层和MAC层制定的标准，其宽带约为100Mps
D.
IEEE802.15的一系列协议是针对无线个人局域网行为的范围
【简答题】The best way to avoid getting hooked in Internet is ______.
【单选题】Listening out for whale song is one way that ships can avoid colliding with whales. But what do you do if the whales aren't singing? One answer, developed by researchers in the Canary Islands, is to f...
A.
are the only Whales that can sing songs
B.
are the only whales capable of masking the clamour of ocean noise
C.
provide clues to scientists to study sea currents and waves
D.
are on the very verge of distinction
【单选题】下面关于无线个人局域网技术说明错误的是()。
A.
IEEE802.15.是红外传输技术协议。
B.
IEEE 802.15.4是针对低速个域网物理层和M AC层制定的标准。
C.
IEEE 802.15.3是针对超宽带个域网物联层和M AC层制定的标准,其宽带约为100M ps。
D.
IEEE 802.15的一系列协议是针对无线个人局域网行为的范围。
【单选题】One of the best way to avoid plagiarism is ________________.
A.
to know what plagiarism is and what is NOT plagiarism
B.
to summarize the information of the original text in your own words
C.
to give credit to the original authors whenever you quote or paraphrase someone else’s words, or when you use someone else’s ideas
D.
to rewrite the original author’s sentences or paragraphs
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