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I decided I'd decide I decide I'm deciding
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I’m deciding I’ll decide I decide I decided
can; must can; cant may; mustn′t must; can′t
I decide I decided I’ll decide I’d decide
I’m deciding I’ll decide I decided I decide
YO3-体现了还原性 若Y.为短周期元素,则Y.对应的元素有2种可能 Y.可能位于ⅤA.族 Y.最外层有7个电子
Y 侧故障相电流等于 Yo 侧故障相电流 Y 侧故障相电流等于 Yo 侧故障相电流的 2/3 Y 侧非故障相电流等于 Yo 侧故障相电流的 1/3 Y 侧故障相电流等于 Yo 侧故障相电流的 3/2