I am a student. I'm 　　 a high school. A. of B. about C. in D. on

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交流电峰值Im与有效值I之间的关系为

Im=πI Im= √2I Ie= √2Im Im=√2/2I

—You’renotafreshmanareyou—______Iamasecond-yearstu

Yes, I’m not No, I am No, I’m not Yes, I am

交流电峰值Im与有效值I之间的关系为

Im=πI Im=2I Ie=2Im Im=2I

--You'renotafreshmanareyou--______Iamasecond-years

Yes, I'm not No, I am No, I'm not Yes, I am

Youareastudent_________Iamastudent.

but or and so

—Iastudent.MynameJean.

is; am are; is am; are am; is

--IamastudentLucysaiD.--Lucysaid___________.

I was a student that she was a student that I am a student that she is a student

FiveyearsagoI____achilD.TodayI____amiddleschoolstu

am, was, will be was, am, will be was, will be, am am, am, was

—You’renotafreshmanareyou—______Iamasecond-yearstu

Yes, I’m not No, I am No, I’m not Yes, I am

正弦交流电的有效值I与最大值IM的关系是.

I=21/2Im I=21/2Im/2 I=2Im I=Im/2

I________astudent.Myname________WangHong.sis

am，is is，am i

交流电的最大值Im和有效值I之间的关系为

Im=√ 2I； Im=√2I／ 2； Im=I； Im=√ 3I。

Iamsureifyouareastudent.

交流电峰值Im与有效值I之间的关系为

Im=πI Im=I Ie=Im Im=I

--You'renotafreshmanareyou--Iamasecond-yearstudent

Yes, I'm not No, I am No, I'm not Yes, I am

--You'renotafreshmanareyou--______Iamasecond-years

Yes, I'm not No, I am No, I'm not Yes, I am

交流电的最大值Im和有效值I之间的关系为

Im = 2I Im = 2I/2 Im =I Im = 3I。

—You’renotafreshmanareyou—Iamasecond-yearstudent.

Yes, I’m not No, I am No, I’m not Yes, I am

交流电的最大值Im和有效值I之间的关系为

Im=√2I Im=√2I／2 Im=I Im=√3I

I______astudentlastyearbutnowI______ateacher.

am; am was; am am; was was; was

I am a student. I'm 　　 a high school. A. of B. about C. in D. on

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