Science has told us so much about the moon that it is quite easy to form an idea of what it would be like to go there. It is certainly not a friendly place. As there is no air or water, there can be no life of any kind. Mile after mile there are only plains(平原) of dust with mountains around them. Above, the sun and stars shine in the black sky. If you step out of the mountains shadows, it will mean moving from terrible cold into great heat. The moon is also a very silent(安静的) world, for sound waves (声波)can only travel through air. But from the moon, you can see a friendly sight(景色). Our earth is shining more brightly than the stars. It looks like a large ball, coloured blue and green and brown.

小明和小张两人练习电脑打字，小明每分钟比小张少打6个字，小明打120个字所用的时间和小张打180个字所用的时间相等。设小明打字速度为x个/分钟，则列方程正确的是（     ）

******强调要大力保持党员、干部思想纯洁,加强思想建设,教育引导广大党员、干部坚定理想信念,坚守共产党人的精神家园。有人认为,坚守共产党人的精神家园,最根本的就是要坚持马克思主义的指导。请结合生活与哲学的相关知识分析这一观点的正确性。

你知道什么是健康的生活方式吗? 请以What is a healthy lifestyle为题, 根据下列提示写一篇不少于80词的英文短文。可适当发挥。

提示: 1. 充足的睡眠;

2. 积极的锻炼;

3. 合理的饮食。

What is a healthy lifestyle

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