如图所示,长均为d的两正对平行金属板MN、PQ水平放置,板间距离为2d,板间有正交的匀强电场和匀强磁场,一带电粒子从MP的中点O垂直于电场和磁场方向以v0射入,恰沿直线从NQ的中点A射出;若撤去电场,则粒子从M点射出(粒子重力不计).以下说法正确的是( )
( ) The elephant has four . A. arms B. legs C. ears
( ) I two apples and he one. A. has; has B. have; have C. have; has
选择划线部分读音不一样的一项。 ( ) (1) A. cute B. uncle C. computer ( ) (2) A. blue B. fun C. umbrella ( ) (3) A. leg B. me C. eat ( ) (4) A. sun B. unit C. but
( ) I have two rulers. ________ is long, ________ is short. A. One, two B. One ruler, two C. One, the other
( ) The elephants __________ long noses.They can _________ flowers(浇花). A. have, water B. has, water C. with, water