以下哪个案例属于使用分割原理（）。
A、我们需要的是照明而不是照明设备
B、我们需要的不是真空吸尘器而是它的清洁能力
C、磨砂新技术
D、电动割草机在小规模的草地上可以很好地工作
相关热点： 割草机 照明设备 小规模
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以下哪个案例属于使用分割原理（）。
A、我们需要的是照明而不是照明设备
B、我们需要的不是真空吸尘器而是它的清洁能力
C、磨砂新技术
D、电动割草机在小规模的草地上可以很好地工作
下面是噪音与人体健康关系的统计说明，阅读表格，回答问题。
音量
噪音情况
与人体健康的关系
40-60分贝
一般说话的声音
不影响人体健康
60-80分贝
相当于一台打印机或一台割草机发出的声音
人的心血管将受到伤害
80-100分贝
相当于一辆从身边驶过的卡车或电锯发出的声响
会对人的听力造成很大伤害
100-120分贝
相当于圆锯或迪斯科舞厅、随身听、战斗机发出的声响
严重影响人们的听力，人们难以忍受，身心受到伤害
120分贝以上
相当于爆破及有些打击乐发出的声响
人们会失眠、心慌，精力无法集中，健康将会遭受极大伤害
1．根据表格内容，用一句话概括噪音与人体健康的关系。 _____________________________2．降低噪音污染已成当务之急，对此你有什么建议？请写出一条。 _____________________________
著名的大地艺术家斯坦·赫德用什么工具在65公顷的土地上作画？（）
A、坦克
B、拖拉机
C、割草机
It's a typical Snoopy card; cheerful message, bright colors, though a little yellow and faded now. Though I've received fancier, more expensive card over the years, this is the only one I've saved. One summer, it spoke volumes to me.
I received it during the first June I faced as a widow to raise two teenage daughters alone. In all the emotional confusion of this sudden single parenthood, I was overwhelmed with, of all things, the simplest housework, leaky taps, oil changes, even barbeques（烧烤). Those had always been my husband's jobs. I was embarrassed every time I hit my thumb with a hammer or couldn't get the lawnmower（割草机) started.
My uncertain attempts only fueled the fear inside me: How could I be both a father and mother to my girls？ Clearly, I lacked the tools and skills.
On this particular morning, my girls pushed me into the living room to see something. （I prayed it wasn't another repair job). The "something" turned out to be an envelope and several wrapped bundles on the carpet. My puzzlement must have been plain as I gazed from the colorful packages to my daughters' bright faces.
"Go ahead! Open them!" They urged. As I unwrapped the packages, I discovered a small barbecue grill （烧烤架) and all the necessary objects including a green kitchen glove with a frog pattern on it.
"But why？" I asked.
"Happy Father's Day!" they shouted together.
"Moms don't get presents on Father's Day". I protested.
"You forgot to open the card". Jane reminded. I pulled it from the envelope. There sat Snoopy, on top of his dog house, merrily wishing me a Happy Father's Day. "Because", the girls said, "you've been a father and mother to us. Why shouldn't you be remembered on Father's Day？"
As I fought back tears, I realized they were right, I wanted to be a "professional" dad, who had the latest tools and knew all the tricks of the trade. The girls only wanted a parent they could count on to be there, day after day, performing repeatedly the maintenance tasks of basic care and love.
The girls are grown now, and they still send me Father's Day cards, but none of those cards means as much to me as that first one. Its simple message told me being a great parent didn't require any special tools at all—just a willing worker.
By "it spoke volumes to me", （Para. 1) the mother in the story means the card______.
A．conveyed significant meanings to her
B．aroused great sorrow in her
C．brought her pleasant feelings
D．made her feel important