眼镜处方+3.50+1.00*170的另一种处方表示为()
A: +2.50+1.00*170
B: +2.50-1.00*80
C: +4.50+1.00*80
D: +4.50-1.00*80
A: +2.50+1.00*170
B: +2.50-1.00*80
C: +4.50+1.00*80
D: +4.50-1.00*80
举一反三
- 眼镜处方+3.50+1.00*170的另一种处方表示为() A: A+2.50+1.00*170 B: B+2.50-1.00*80 C: C+4.50+1.00*80 D: D+4.50-1.00*80
- 综合验光度数为:+5.00/-1.00×170,软镜度数是 A: +4.25 B: +4.50 C: +4.75 D: +5.00
- 25℃时,水的离子积是() A: 1.00×10-14 B: 1.00×10-7 C: 1.00×1014 D: 1.00×107
- 67cm处检影时,60度方向,-3.50中和,150方向-1.00中和,该眼的屈光状态是( ) A: -2.00/-2.50*150 B: -1.50/+2.50*150 C: -2.50/+2.50*150 D: -2.50D/-2.50*150
- 1. Charges of 3.00 nC, –2.00 nC, –7.00 nC, and 1.00 nC are contained inside a rectangular box with length 1.00 m, width 2.00 m, and height 2.50 m. Outside the box are charges of 1.00 nC and 4.00 nC. What is the electric flux through the surface of the box?