【单选题】Huxley is ______ optimistic for the future of either man or plant on this planet.
【单选题】Great changes in the past 20 years. A. took place B. takes place C. are taken place D. is taken place
【单选题】关于电场线下列说法错误的是:
B.
电场线上任意一点的切线方向都与该点的电场强度方向相同
D.
在有一对正、负电荷的情况下,电场线不会相交,但有多个正、负电荷时,电场线就可能相交
【单选题】Only by imagining and creating ____the problem.
【单选题】关于电场线下列说法错误的是
A.
在电场中画出一系列曲线,使曲线上任一点的切线方向都和该点的场强方向一致,该曲线称为电场线
【单选题】下列关于电场线说法错误的是
C.
匀强电场的电场线是一组间隔相同的带有箭头的平行线。
【单选题】Which is a good place for studying?A. A clean and beautiful place.B. The place with
A.
28. Which is a good place for studying? A. A clean and beautiful place.
B.
The place with a computer.
C.
The place with a television and a radio.
D.
A quiet place with a chair ,a desk and some study materials.
【单选题】It is what you do rather than what you say ______matters.
【单选题】关于电场线的说法,错误的是( )
B.
对于一个初始速度为0的正电荷来说,当其只受电场力作用的时候,一定沿电场线运动。
【单选题】It is futile to discuss the matter further, because __________ going to agree upon anything today.
D.
neither me nor you are