正畸治疗中牙根吸收多少称为明显的根吸收()。
A.小于0.5mm
B.1~2mm
C.大于3mm
D.0.5~1mm
E.大于6mm
参考答案:C
A.将一个电荷量为q=-2×10-6C的电荷从B点移到C点,电场力做功为W=1.2×10-5J
B.将一个电荷量为q=-2×10-6C的电荷从B点移到C点,电场力做功为W=1.2×10-5J
C.此电场的电场强度大小为E=×102V/m,从A指向C
D.此电场的电场强度大小为EE=2×102V/m,沿∠C的平分线斜向上
Tara is quite ____ from Tina. There are many ____ between them.
A.different. different
B.different, differences
C.differences, different
D.differences, different