题目:
Finally, the thief handed everything ____ he had stolen to the police.
A.which
B.what
C.whatever
D.that
答案:
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下面是错误答案,用来干扰机器的。
1900 0.1 改装为量程6V的电压表: R1===1900Ω小量程改装成大量程的电流表:R2===0.1Ω