（1）计算：9-（π-3.14）0+2cos60°；（2）先化简，再求值．(1a-b-1a+b)÷ba2+2ab+b2，其中a=1+2，b=1-2．-数学

更多内容推荐

• （1）计算：(110)-1+12-22-3-(2004-2)0；（2）分解因式：x3-x2y-x+y．-数学
• Plants need water and sunlight to grow well. _____, a healthy body requires a balanced diet.A．Formal
• He used the small room ___ a lab.A．likeB．asC．toD．about-英语
• Father won’t agree to fly to Paris for the holiday. It is expensive.A．far tooB．too muchC．very muchD
• （-12）0=______；（-13）-2=______．-数学
• 计算：|-2|+2sin30°-（-3）2+（tan45°）-1．-数学
• People go to clean graves and light incense their ancestors.A．in debt B．in their turn C．in memory of
• Everybody went to the opening ceremony of the film festival——_______ Francisco, who has no interest
• It's no use trying to solve problems _____. Talks are the only solution. [ ]A. by the way of wa
• The island is ____ attractive in spring and autumn because of the pleasant weather in both seasons.A
• 句型转换.每空填一词,使该句与所给句子意思相同.1. With the help of a good teacher, John made great progress in his English
• —How do you like your trip to Hainan?—________,I enjoyed it very much，although the weather was hot s
• --- How many students are there in your school?--- There are 2,000 students here __________.A．first
• __________ the crisis of economy getting more and more serious, the government is searching for ways
• Yifu library was named ______ a businessman devoted to China’s education.A．in honour ofB．instead ofC
• 计算：（1）(-1)2-16+(-2)0；（2）a（a-3）+（2-a）（2+a）．-数学
• 计算：2sin60°+2-1-20080-|1-3|．-数学
• ---I have seen so little of Mike______. Is he away on business?---Oh, no. He just leaves for his off
• （1）计算：2-1+（5-1）0+sin30°；（2）先化简，再求值：x+3x2-9+3x-3，其中x=-1．-数学
• The official involved in the scandal said he was under ______ to make the false statement to the pol
• As is often pointed out, knowledge is a two-edged weapon which can be used ________ for good or evil
• ____________ two exams to worry about, I have to work really hard this weekend.A．As forB．BesidesC．Wi
• ——The weather is too cold ____ March this year.——It was still ____ when I came here years ago.A．for;
• （1）计算：12-2sin60°-（5+2）0；（2）解方程：5x-1=3x+1．-数学
• （1）计算：（-2010）0+（sin60°）-1-|tan30°-3|+38；（2）先化简：x2x+3÷34x2-9•12(1-32x-3)，若结果等于23，求出相应x的值．-数学
• The girl seldom, if _____, turned to her brother for protection.A．neverB．everC．alwaysD．then-高三英语
• 计算：|-2|-（12）-1+（π-3.14）0+8×cos45°-数学
• She is well-known＿＿＿＿her poems and she is also famous ＿＿＿an actress. A．for； forB．as； forC．for； asD．b
• The children ran away________all directions the moment they caught sight of their teacher coming nea
• The newcomer was______ a very old woman , but in fact she is only a little over forty.A apparently
• 如果等式（2a﹣1）a+2=1，则a的值为（）。-七年级数学
• _____ being fun and good exercise, swimming is a very useful skill.A．As toB．In spite ofC．regardless
• There’s ____ water on the playground, so we won’t have the P.E. class there.A．too manyB．many tooC．to
• To their relief, their students ________ escaped from the shaking building.[ ]A．narrowlyB．slightlyC．
• Football is very important to me, but _____ is our friendship.A．asB．soC．alsoD．too-高二英语
• （1）计算：(2010-π)0-(12)-1+2cos60°-|5-2|．（2）先化简，再求值：a2+2a+1a2-1-aa-1，其中a=3+1．-数学
• 计算：①sin45°•cos45°+tan30°；②2-1-tan60°+(5-1)°+|-3|．-数学
• Housing prices in Beijing and Shanghai are now largelyfor low-income families,A．out of controlB．out
• 24. Children should be taught to share, ____________ the parents must attach a lot of importance.A．i
• 计算：-13÷3×13+(3.14-π)0-(-13)-2．-数学
• The number of people who have had flu (流感) in America this month is________as last month.[ ]A．twice
• Traffic is bad, ______ in the city center during the rush hours.A．particularly B．terriblyC．mostlyD．n
• Although the country has had political independence for over a century,it needs the support of its n
• （1）计算：(1-22)0+(15)-1-2cos45°+|-2|；（2）先化简，再求值：12a-a2-1a2-2a+1÷a2+aa-1，其中a=-12．-数学
• （12）-1+（-2009）0-9+2sin30°=______．-数学
• During World WarⅡ, Japan attacked Pearl Harbor without declaring war _____ America.A．in B．with C．to
• You can go to see your sick granny, but you mustn’t stay there _____ visiting hours.A．acrossB．withou
• （1）计算：|-2|+2sin30°-(-3)2+(tan45°)-1（2）计算：sin60°+tan45°cos30°-4sin230°-数学
• (-3)0-27+|1-2|+12+3．-数学
• He spoke very slowly, but he still didn’t get his meaning _______. A across B cross C through D thou