题目内容

At my favorite job site, I submit my resume for a job, with Google. Soon I receive an e-mail from a recruiter representing Google. He says that the company is very interested in me, but as part of their pre-screening process, he needs to do a reference check and a credit screening before any interviews are scheduled. So he wants me to send him an e-mail with my Social Security Number and the address of my last residence. His e-mail address is GoogleJobs@yahoo.com.Is it a True job offer?

A. Yes.
B. No.

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Out of the blue, I receive e-mail with “employment@Google.com” as the “from” address, claiming to have found my resume on a major job board.Is it a True job offer?

A. Yes.
B. No.

下列各组酸碱对中,不属于共轭酸碱对的是()

A. H2+Ac-HAc
B. HAc-Ac-
C. HNO3 - NO3-
D. H2SO4-SO42–

轭酸碱对的Ka与Kb的关系是( )

A. KaKb=1
B. KaKb=Kw
C. Ka/Kb=Kw
D. Kb/Ka=Kw

某弱酸HA的Ka=1.0×10-3,1.0 mol/L的该酸水溶液的pH为( )

A. 3.0
B. 2.0
C. 1.5
D. 6.0

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