通过推导,找到双棱镜干涉实验中虚光源间距的最佳测量位置,从而减小间接测量引入的误差,提高测量精度.The optimum measuring position of virtual source in Fresnel double prism experiment is found by derivation.通过实验结果作出正交双棱镜干涉的光强度分布曲线.The distribution curves of light intensi...
The housemaster fixed Jack with a decidedly hostile look.房东恶狠狠地瞪着杰克.It's better that the housemaster guides the children when they are watching TV.孩子看电视时最好有家长在旁边指导....
The tenor was a pupil of a singer.这位男高音歌手师承一位歌唱家。A bonus of up to 5 per cent can be added to a pupil's final exam marks as a reward for good spelling, punctuation and grammar...小学生期末考试的分数最多可以加5分，作为对其拼写、标点和语法正确的奖励。As...
He thought he had made an end of the little grasshopper.他以为把那个小蚱蜢干掉了.I've known him since he was knee - high to a grasshopper.他很小的时候我就认识他了.I haven’t seen you since you were knee-high to a grasshopper!我上次见你你还是个小不点呢！C...
Such is the case in pyrrole, thiophene, and furan.吡咯, 噻酚和呋喃的情况就是这样.It'shows that the key step is the synthesis of 4 - methyl - dihydro - furan - 2 , 3 - dione.研究结果表明关键步骤为原料 4- 甲基 -2, 3- 呋喃二酮的合成.A novel furan resin w...