超声清洗及超声碎石是利用声能____的性质工作的，而回声定位则利用了声能____的性质．

下列句子排序正确的一项是（     ）

①张悟本掀起的所谓“绿豆治病”热，与过去出现的“鸡血”热、“红茶菌”热等，都是骗子利用人们重视保健的心理，以偏概全、以假乱真制造的种种养生鬼话。

②对于假冒伪劣的东西，质疑精神是“防被骗”的利器。

③比如，说绿豆汤对一切人都具有包治百病的功效，那么，中医赖以立命的“辩证论治”“阴阳平衡”等原理，不统统被推翻了吗？

④质疑精神，就是不轻信，不盲从，遇事多动脑筋，想一想是否合乎实际，是否真有道理。

⑤戳穿这些鬼话并不难，只要带点质疑精神去考察一下，就会发现它们的破绽，发现它们都是“皇帝的新装”。

某同学通过以下步骤测出了从一定高度落下的排球对地面的冲击力：将一张白纸铺在水平地面上，把排球在水里弄湿，然后让排球从规定的高度自由落下，并在白纸上留下球的水印．再将印有水印的白纸铺在台秤上，将球放在纸上的水印中心，缓慢地压球，使排球与纸接触部分逐渐发生形变直至刚好遮住水印，记下此时台秤的示数即冲击力的最大值．下列物理学习或研究中用到的方法与该同学的方法相同的是（  ）

下列物质的使用，不利于人体健康的是(    )

Dear friends,
Do you remember your first day at a new school or in a new area? How about the1when your family2 to a new state? Ugh! What about the feelings of being a stranger?
Then, with time, you find someone who likes 3you like.  Friends are great gifts in life. I have good friends too,  but not because they are completely(完全的)4 .Sometimes they talk too much; sometimes they need me a lot. I know I ask too much of them. I hope my friends, like my father,5about me a lot.
I once told my friends to give me all their love and be generous and gentle. I told my friends, in other words, to love me6I loved them.
They didn’t7 me at first, but then they became kinder. My love for them slowly made them learn to8 friends. They learned to love others and 9the idea that LOVE is part of life.
If we listen to and try to understand each other, love10.We should work on it, even if it’s hard at first. A true friend loves US at all times.
Your friend,
Jesus