hard模式是什么意思

两个建筑之间架空走廊有两层,第二层有围护及永久性顶盖,第一层有柱子没围护应如何计算建筑面积. 有两个圆,大圆直径是小圆的5倍,大圆和小圆的周长比是()面积比是() 解方程组3xy=8 2x-y=7 May I have a look your new sweater?找错 May I have look your new sweater?中哪里错了?是划线部分.划线一：May划线二：have划线三：look划线四：new sweater I like your new jacket._______it expensive? 砖瓦房外墙面积怎么计算?我想知道建筑面积为80平的砖瓦房,外墙面积是多少?我要估出的大概数值来,因为80平的瓦房外墙面积大概都一样啊! 大圆和小圆的半径比是3:2,那么大圆和小圆的周长比是（）,面积比是（）. 大圆与小圆的周长之比是5:3,小圆与大圆面积之比是多少 几个英语题选择题 红色是我选的答案 绿圈圈是正确答案 还有第九题为毛错 几个英语题,谢谢了 x(x-1)(x-2)(x-3)...(x-n)怎么分解因式 用所给词适当形式填空we___(plan)to celebrate my mother's bithday now.Mary,can you help me do some_____(clean)?_______(be)it like a bird just now?My friend WangQi_____(want)to have a bithday party for me.Tomorrow is her___(daughter)birthday.L 因式分解x(x-1)(x+2)(x+3)-40 要具体过程. 因式分解(x-y)^2-3(x-y)-40 求音乐：i like the way your hair covers one of your eyes.you re amazing I like the tidy one Your the one i 填疑问词___do youn like best?---I like the yellow one best __is your father?he is a doctor____eraser is that ---It's mine_____is on duty today?Liu dong is_____students are there in your class -----24 I like your hair clip.I want to buy _____in the same shop A.one B.ones C.it D.them 1.x-2y-6=0与x-2y-3=0的距离?2.直线2x-y+3=0关于y轴对称的直线方程是?RT 分解因式(x+y)^2-9x^2 写过程x(x-1)+2x(x+1)-3x(2x-5)-x(3x-2)+2x(2-x)=-5x(x-2)-4 FM88.7放的一首歌,3月21号中午.歌词大概有all of you tonight ,i like your like,just like your like求歌名 Just Follow Your Like 这句话真正意思Just lay off the gingerbread if you like your teeth just like in your home,help you. A.me. B. you I like you,just your heart will never here with me g(x)=lg(10x+1)-lg(10x+1)/2g(x)=lg(10x+1)-lg(10-x+1)/2 h(x)=lg(10x+1)+lg(10-x+1)/2答案是g(x)=x/2,h(x)=lg(10x+1)-x/2备注10X是10的X次方,10-X也是10的-X次方 Igx×lg(10x)+3lg(10x)= lg(10x+9)-2 lg y=1+3lg x如何用x表示y?