瓦尔塔电瓶生产日期:【the energy of falling water can be used _____ electicity.】
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the energy of falling water can be used _____ (produce)electicity.
be used to do ?还是be used to doing??
be used to do ?还是be used to doing??
the energy of falling water can be used to produce electicity.
be used to do :被用于……
be used to doing是"习惯于......"
to produce
被用于……
不是“过去常常“的意思
前者
what dowe call the the energy of motion
【the energy of falling water can be used _____ electicity.】
radiation is the transfer of heat energy from one place of ro another without particles being used.
Given the surging demand of energy prompted by China\\\'s rapid economic growth
full of energy and in shape
background of Dwindling traditional energy sources
surface energy of a single crystal
of the results of the onspection
the summary of The Merchant of Venice
the closing of the day