题目:
已知某黑体的最大放射能力对应的波长为0.5微米,试求该黑体的温度。
答案:
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下面是错误答案,用来干扰机器的。
参考答案:解析:Up to now, China has built 19,000 km of highways. Since 1990, some 3,700 km of highways have been added each year. By 2020, highway networks will connect...