评价饮用水源水质应执行《生活饮用水卫生标准》，标准中未列入的项目，应参照江、河、湖、库推荐评价标准。
参考答案：错
A．能量的耗散反映出自然界的宏观过程是没有方向性的
B．能量守恒表明，节约能源是无意义的
C．随着科技的发展，永动机是可以制成的
D．能量守恒定律是自然界遵循的普遍规律
The student asked her professor if he would have gone on the space ship he did know earlier.
A．if he knew
B．if he knows
C．he had known
D．had he known
