电流的磁效应----其中最为可用的是要判断一直导线中有没有直流电流通过,手边有下列四组器材,其中最为可用的是 A. 被磁化的缝衣针和细棉线
已知式子 是关于x的二次多项式,且二次项系数为b,数轴上A、B两点所对应的数分别是a和b. (1)则a=____,b=____.A、B两点之间的距离:____; (2)有一
下图反映的是一定时期某种商品供求量(Q轴)随价格(P轴)变化的情况。其中,曲线D为需求曲线,曲线S为供给曲线,两曲线交点为E,E点对应的价格
One afternoon last summer I was driving along on my way home when I noticed a woman at the roadside near the edge of town.She was_41_a wheeled suitcase and was having a rough way to go since there w
. .---Did you enjoy the movie? ---Sure, it is___________a beautiful country town with a variety of cultures. A.put on B.set in C.taken on D.got in
1952年,西欧六国成立欧洲煤钢共同体,正式启动了欧洲一体化进程。经过半个多世纪的发展,到2004年5月1日,欧盟已经成为一支囊括东西欧25国、面积39
地球上种类和数量最多的动物是( ) A.软体动物 B.昆虫 C.鸟类 D.哺
There was a time when I thought my dad I didn’t 36 him ever saying the words “I love you.” It seemed to me his only purpose in life was to say “ 37 ”to anything I wanted to do,