下列运算中，错误的是（）A．π0=1B．2-1=12C．sin30°=12D．8=32-数学

更多内容推荐

• 计算：4-(-13)-2×|-23|+(3-π)0+(-1)2012．-数学
• （1）3sin60°+2-1-2cos45°-(2-1)0（2）2x2+6=7x（用配方法解）-数学
• _____ his arrival at the village of the crows, he found his at the point of death. A．UponB．AboveC．Be
• If there are natural resourcesin a country, it is common for it to export some of them.A．in totalB．i
• 计算或化简：（1）12+20120+|-3|-4cos30°（2）1-a-1a÷a2-1a2+2a．-数学
• 计算：(13)-1+(-1)2013-2sin60°+|-3|-(π-3)0．-数学
• 计算：(13)0+4cos60°+(14)-1．-数学
• 计算：①|3-2|+(-12)0+23-48；②(3+22)(3-22)-(2-1)2．-数学
• —no means shall we let out the secret.—No, no case shall we.A．In; inB．By; withC．In; byD．By; in-高二英语
• When paying for a taxi, he never looks at his wallet –just takes out one note ____ and hands it over
• Anny was banned ______ driving for two years because of a serious accident caused by drinking and dr
• . The chickens will provide us _______ feathers, ______ we can make use for cleaning the table and b
• 计算：18-12÷2-1+22-1-(2-1)．-数学
• —— Excuse me, is this Mr. Brown’s office? —— I’m sorry, but Mr. Brown＿＿＿works here.He left about thr
• 解答下列各题：（1）计算(12)-1+（5+3）0-2sin45°+12+1；（2）先化简，后求值：4a2-4+2a+2-1a-2，其中a=2-2．-数学
• After decades of living under oppression, the people of the Arab world are rising up to rebel ______
• It is ______ that terrorism is a great threat to world peace.A．widely acceptedB．widely acceptingC．wi
• 计算：（-3）2-（-1）-2+（-2012）0=______．-数学
• 计算：（1）12x-12x+127x-50x；（2）(-12)0+(12)-1+33+(3-2)2．-数学
• 计算：13-1+(12)-1-|1-tan60°|+(x2+1)0．-数学
• During the the Qingming Festival many Chinese will go to clean the tombs and light incense _____ the
• The pilot,(飞行员) whether ______ or on purpose, made the plane do a sharp turn.(急转弯)A．by accidentB．at
• He could see the tall chimneys of the factory ______.A．from distanceB．in distanceC．in the distanceD．
• He wants to see changes in the company and I am sure he will, ______.A．on timeB．at a timeC．at one ti
• Women’s earnings are well below men’s, ______ educational difference that are decreasing between the
• It is sometimes said that a society can be judged ____the way it cares ____ its weakest members.A．on
• （1）解方程：x2-4x-12=0；（2）计算：18+(π-3.14)0-2．-数学
• —Now that you like the house with a garden, why not buy it? —Well, I can’t afford ________ house at
• Wei Hua told me that Wu Dong was＿＿＿＿＿＿＿ill. A．terribleB．very terrible C．terriblyD．too terrible-英语
• When we climbed up to the top of the mountain, we were all ___________.A．out of the breathB．short of
• 计算：2sin60°-3tan30°+(13)0+(-1)2010．-数学
• 计算：(-12013)0+|3-2|+3tan30°-2cos45°．-数学
• In the worst-affected regions, many areas remain in chaos(混乱), with roads inaccessible, public trans
• It was considerate _____ you not to play the piano while I was asleep.A．ofB．forC．toD．from-高三英语
• He began to take political science ________ only when he left school. A．strictlyB．trulyC．carefullyD．
• You don’t have to be angry with him. He ________ wanted to know the truth. A．almostB．mostlyC．merelyD
• （1）计算：-12012+(12)-2-(tan62°+2π)0+|27-8sin60°|，（2）先化简，再求值：（a2-5a+2a+2+1）•a2-4a2+4a+4，其中，a=2+3．-数学
• The teacher took ____ the lesson where she stopped and finally she set_____ a few minutes to let us
• Read the passage ______ which I__________ in my talk.A．from; inferredB．to; preferredC．to; referredD．
• 计算（1）（12）-2-23×0.125+20120+|-1|（2）（-a2b3c4）（-xa2b）2（3）（-m）2-（m2）2÷m3（4）-2a2（12ab+b2）-5ab（a2-ab）-数学
• ________ having fun with friends, travelling around the world will be another way to relax and learn
• I’ve got ＿＿＿＿＿＿work to do on a ＿＿＿＿＿＿＿＿ cold day. A．much too； much tooB．too much； too much C．too muc
• I was wondering what to do and＿＿＿＿＿＿Mr. Wang came in. A．justB．just nowC．just thenD．justly-英语
• ________your help，how could I have passed the difficult interview!A．But forB．Thanks toC．Owing toD．A
• The new group of students is better-behaved than the other group who stayed here ________. A．earlyB．
• 计算下列各题（1）2x27x+6x43x（2）cos30°+sin45°-tan30°•tan60（3）27-1513+1448+12（4）27+2sin30°+（x-2）0-2．-数学
• 计算题：①|-2|-116+(-2)-2-(3-2)0；②12×12-32÷133．-数学
• . The ancient Chinese vases _______ display attracted lots of experts and collectors, some of whom s
• ----What about going on a trip?----Sound a good idea. But I don't have time now and____it'
• 计算或化简（1）（12）-2×（3-2）0÷（-13）-1（2）4x2-4+42-x．-数学