1.Please try to list some of the scientific and technological discoveries that have changed or will change the way people live, and explain in what ways these discoveries change our lives for the better and for the worse.
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What is your attitude toward science? Which, in your opinion, is more significant, the increase in the living standard brought about by scientific developments or the harm caused by them?
若点A的坐标为(0,20,35),下列说法正确的选项是:
A点在W面上。
B. A点在V面上。
C. A点在H面上。
D. A点在y轴上。
若点A的坐标为(25,10,0),下列说法正确的选项是:
A点在W面上。
B. A点在V面上。
C. A点在H面上。
D. A点在x轴上。
若点A的坐标为(0,0,40),下列说法正确的选项是:
A点在W面上。
B. A点在x轴上。
C. A点在y轴上
D. A点在z轴上。