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【单选题】
用放电计测量蓄电池( )放电时的端电压来判断蓄电池放电程度和起动能力。A.
无
B.
小电流
C.
大电流
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举一反三
【单选题】Many of us live our lives running behind time , but we only reach it when we ________ a heart attack .
A.
died from
B.
died for
C.
died in
D.
die of
【简答题】通过学习，小明了解到随意丢弃的废电池对土壤除了造成汞、镉等重金属污染外，还可能会产生其它污染，为此他设计如下实验进行探究：取某种废弃电池的内容物，加适量的水搅拌，过滤后取其滤液，将pH试纸直接浸人滤液中．测定其pH。依据上述事实完成下列问题： （1）过滤操作中下列仪器不需要的是 （请选序号）。 ①漏斗 ②烧杯 ③酒精灯 ④玻璃棒 （2）小明使用pH...
【单选题】It's navel gazing time again, that stretch of the year when many of us turn our attention inward and think about how we can improve the way we live our lives. But as we embark on this annual ritual of...
A.
They want to know if they get prepared for the future.
B.
They consider it beneficial to their future lives.
C.
They pay too much attention to their self-improvement.
D.
They overemphasize their progress in the past year.
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