()8.—Icalledyoulastnightbutyoudidn'tanswer.—SorryGrace.IIamASingerwhenthephonerang.(2015长沙)A.amwatchingB.waswatchingC.havewatched
() 8. —I called you last night but you didn't answer.
—Sorry Grace. I I am A Singer when the phone rang. (2015 长沙)
A. am watching
B. was watching
C. have watched
B
1.如果a≠0,p是正整数,那么下列各式中错误的是：（）A.a^-p=1/a^pB.a^-p=（1/ 2020-03-30 …
求出下列各式中的字母a的取值范围：1.a＜a/22.a＜1/a3.|a|/a=-14.1/a＞a＞0 2020-03-30 …
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—Watch!—IbutIanythingunusual.A．watched;havewatche 2020-05-13 …
——Watch!——IbutIanythingunusual.A．watched;havewatc 2020-05-13 …
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()8.—Icalledyoulastnightbutyoudidn'tanswer.—SorryG 2020-10-30 …
递回关系式的运算公式(数列)以下是推导一个公式"a=a+r(1-p^n)/(1-p)"的过程a=p* 2021-01-13 …