A.is near Conisbrough station
B.is open for 8 hours every day
C.is busy on Christmas Day
D.can be reached by air
答案:A
解析:细节理解题。根据“Conisbrough station is next to the entrance to the Earth Centre and is on the Doncaster to Sheffield line.”可知应选A项。
C
MIT researchers and their colleagues are working to find out whether energy from trees can power a network of sensors(传感器)to prevent spreading forest fires.
What they learn could also raise the possibility of using trees as silent guards along the nation's borders to discover potential threats such as smuggled(走私的)radioactive materials.
The U.S.Forest Service currently predicts and tracks fires with a variety of tools,including remote automatic weather stations.But these stations are expensive and sparsely(稀疏地)distributed.Additional sensors could save trees by providing better local climate data to be used in fire prediction models and earlier warnings.However,recharging or replacing batteries by hand at very hardtoreach locations makes it impractical and costly.
The new sensor system seeks to avoid this problem by developing trees into a selfsustaining power supply.Each sensor is equipped with a battery that can be slowly recharged using electricity produced by the tree.“A single tree doesn't generate a lot of power,but over time the trickle(细流)charge adds up,just like ______” said Shuguang Zhang,one of the researchers on the project and the associate director of the MIT's Center for Biomedical Engineering(CBE).
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