单选题
According to the passage, because temperatures in a tunnel can be very high, ______.
A、
the Robogat has to have a heat-resistant skin
B、
the Robogat is operated in a control centre outside the tunnel
C、
the Robogat can only work at the scene of a fire for a limited period
D、
a Robogat is stationed at each end
【正确答案】
A
【答案解析】
从第二段The machine’s hear--resistant skin is designed to withstand temperatures of up to 1，000°C可以判断由于温度很高，它需要有heat-resistant skin。
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