创新课时作业七下数学

-a²+6ab-9b² 在锐角三角形ABC中,下列各式恒成立的是A.logcosC(sinA)>logcosC(cosB) B.logcosC(cosA)>logcosC(sinB)C.logsinC(sinA)>logsinC(cosB) D.logsinC(sinA)>logsinC(sinB) 判断下列方程有几个实解2^x+x²=0(1/2)^x-2=-1/2x 方程的解和方程是一回事吗?判断提 最大的一位数与最小的两位数的积去除30与3的差,得数是多少? 判断：8是方程x+2=10的解 已知一次函数y=ax十b的图象过一二四象限,且与x轴交于点(2,0),则关于x的不等式a(x-1)-b>0的解集为( ) A.x1 C.x>-1 D.x 英语翻译rap You think it’s perfect Everything is so fine Wait till you look it through your Spiritual eyes You think it’s nice But please open your eyes This place is but a Beautiful STY You want it I want it Everything ‘s a want We lose it 蜈蚣有多少只脚呢?公的脚多,还是母的脚多? 蜈蚣到底有多少只脚? 请问蜈蚣到底有多少只脚啊? 陈尧咨是哪个朝代的? 陈尧咨射箭概括 陈尧咨是个怎样的人 谁能帮我翻一下下面的英语if you have worked hard at other times you wont have to sit up all night before the exam Where have you typically ranked on standardized tests such as those used for admittance into univers To realize the value of ONE YEAR,ask a student who failed a grade.To realize the value of ONE MONTH,ask a mother who gave birth to a premature baby.To realize the value of ONE WEEK,ask the editor of a weekly newspaper.To realize the value of ONE HOUR 帮我翻一下下面的英文Maybe God wants us to meet a few wrong people before meeting the right one, so that when we finally meet the person, we will know how to be grateful. If you shed tears when you miss the sun,you will also miss the stars! 土星在古代被称作填星还是镇星? 土星卫星6号星说一下它的具体情况. 为什么说土星是星中美人? 土星等其他星是什么?什么作用?可以进入吗 扩号里应填什么?Hi Tim.What's this＿＿＿English? 扩号里该填多少啊 第二题这么做? 扩号里填什么 ( ）气（ ）息,扩号里填什么?正确的!55555要快! 将边长为1的正三角形薄片,沿一条平行于底边的直线剪成两块,其中一块是梯形,记S= , 神（ ）（ ）神 扩号里填什么扩号里两字是什么,组成一个四字词语 已知X+Y=4,丨x丨+丨y丨=7,那么x-y的值是 已知丨x丨=7丨y丨=2且丨x+y丨=-(x+y)求x-y的值 已知X+Y=4,丨x丨+丨y丨=7,那么x-y的值是.明白点.很高