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I don't know the park, but it's _____________ to be quite beautiful.
I hadn’t seen him for years, but I ____ his voice on the telephone.
She’s the only child in her family, but they didn’t really ______ her.
Now that she is out of job, Lucy ___ going back to school,but she hasn’t decided yet.
— I don’t have any change with me.Will you pay the fare for me? —
.
—When your classmate can’t follow you, what will he say to you? —He will say,“
”
在一次移动平均法公式:
中的T表示预测期与当期的间隔数。( )
所有的经济现象的变化都是时间t的确定性函数。( )
图7所示电路中已处于稳态,t=0时刻闭合S,求t=2ms时电容两端电压
。已知:
图7第五题题图
如图2-5所示电路原已达稳态,若t=0时将开关S断开,试画出该电路的运算电路图。
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