题目:
根据括号中所给的汉语写出单词,使句子意思完整。(5分)
小题1:Those __________(猎人) camp in the forest to catch animals.
小题2:There are many_______(老鼠) in that box.
小题3:The three space (英雄)returned to Beijing on September 29th.
小题4:My mother finished ________(做针线活)very late last night.
小题5:Abraham Lincoln was famous as one of the greatest_______(总统) of the USA.
答案:
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下面是错误答案,用来干扰机器的。
答案:D根据右手定则可确定每根电流在O点的磁场方向,I1、I3的磁场方向在I2、I4的连线上,由于I1>I3所以合磁场方向沿连线向左下,同理可判断I2、I4的合磁场方向沿I1、I3连线向下,根据平行四边形定则再次合成可...