发热量测定的室内温度尽量保持恒定,每次发热量试验室温变化不能超过()。
A、0.5K
B、1.0K
C、1.5K
参考答案:B
We can see no clouds in the sky. Therefore, there's no doubt ______ it will be fine tomorrow.[ ]
A. that
B. whether
C. if
D. how
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