问题
解答题
25×99+25可以用乘法分配律进行简便计算．______．
答案
25×99+25，
=25×99+25×1，
=25×（99+1），
=25×100，
=2500，
所以原题说法正确．
故答案为：√．
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25×99+25可以用乘法分配律进行简便计算．______．
25×99+25，
=25×99+25×1，
=25×（99+1），
=25×100，
=2500，
所以原题说法正确．
故答案为：√．
Cleanse, tone and moisturize: three words that everyone should keep in mind when going through their daily routines. As a society, we decide what are important habits to keep up with, such as taking care of your skin. It takes a good five minutes every morning and night to properly care for your skin, but most men and women believe that they do not have time in their busy schedule to do so. Having good skin boosts（增加）sef-confidence and improve overall health and attitude. Cleansing the face is important for women who wear make-up because it clears the face from exposure to free radicals（自由基） in the air. Toning your face is important to balance your skin’s PH level ( which needs to be between 4.5 and 5.5 ) and also to remove the impurities from water, which is full of lead. Finally, moisturizing your face hydrates（增湿）the skin. In this day and age there are more issues with free radicals that damage your skin than ever before. Smog, UVA/ UVB damage, smoke, alcohol, and more are all negative contributing factors to damaging the aging of your skin. The global community has advanced the environment into a high percentage of free radical, but we also now have the technology for the best skin care. The issue with skin care is most people feel that you only need to take action if you have a serious skin condition, such as acne(粉刺). But no matter what age and what condition your skin is in, you should actively do something to maintain it. Most skin care products today are all-natural; many of them advertise being 100 percent vegan（素食）. Ingredients（成分）that are natural for anti-aging are : DMAE, alpha lapoic acid, antioxidants, collagen booster, SPF and many more. All of these ingredients help prevent aging and sun damage while regenerating new skin cells. Aging appears fastest on your face, neck, and back of the hands and feet, which means you must apply skin care products to all areas. People need to take care of their skin, whether they have a skin condition or not. If one wants to age gracefully, one must put forth the effort on their skin.
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