请写明理由..A.B,.C如图,A、B、C三点表示三个镇的地理位置,随着乡镇工业的发展需要,现三镇联合建造一所变电站,要求变电站到三镇的距离相等 ,请画出变电站的位置(用P点表示),我会画图,但是

(a-b)^4-(a-b)^2请仔细说明理由,写明每一步过程. President Bush _____an speech in Tsinghua University recently.a:discovered b:located c:resource d:delivered请写明理由,谢谢! The old man said he ____some medicine this afternoon ,A buys B will buy C would buy 请写明理由 (a-3b-2c)(a-3b+2c)=请写明过程 请写明理由..A.B,.C如图,A、B、C三点表示三个镇的地理位置,随着乡镇工业的发展需要,现三镇联合建造一所变电站,要求变电站到三镇的距离相等 ,请画出变电站的位置(用P点表示),我会画图,但是 -What's one fourth and a half,do you know?-Yes,it's___.A.two sixths B.three fourths C.one three D.three sixths请写明理由, Nanjing is a city with many places of interest.___tourists come here every year.A.Thousand of B.Thousand C.Thousands D.Thousands of请写明理由, you had a party yesterday,the party was ___was not it?A.funny B.pleasure C.fun D.excited请写明选择理由 Dont worry .It so ______that I have brought another key to the office.a:goes b:happens c:appears d:occurs请写明选择的理由, Don't wear jeans,or ___won't be Aiilwed to go to the concert.A.I B.you C.they请写明理由, 下列哪个不属于氮气的用途.如题、写明理由.A.制氮肥B.作粮食瓜果的保护气C.制作霓虹灯D.制造炸药 our school is_____children_____6-12A in,for B for,of C of ,for 请写明原因. 如图,在Rt△ABC内有边长分别为a,b,c的三个正方形,则a,b,c满足的关系式麻烦写明过程 who ____went there with you?i went there alone.A、others B、other C、else D、another要写明理由！ 如图cd平行ab角a=角b则角c=角D请说明理由 如图,在城墙角B的两侧的墙边有A、C两点,请设计方案测量出A,C两点间的距离,并说明理由.如题. he works hard,because this is ( )important work A.a B.an C.the D./请写明原因,急, 如图,直线a,b被直线c所截.请给出一个合适的条件,使a‖b,并说明理由.