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【简答题】
2÷5= ()+2 5×2 =______%=______（填小数）
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【单选题】No sooner _____ the boy fall into the pond than he ____ to his feet and went to the rescue.
A.
he had seen… jumped
B.
had he seen… jumped
C.
has he seen… is jumped
D.
did he see… had jumped
【单选题】对称三相负载三角形联结, 电源线电压 =220∠ 0°,如不考虑输电线上的阻抗, 则负载相电压 =( )V。
A.
220∠-120 °
B.
220∠0°
C.
220∠ 120°
D.
220∠150°
【单选题】Hardly ______ he entered the classroom when the rain began to fall in big drops.
A.
he has
B.
has he
C.
he had
D.
had he
【单选题】下列哪个是 EditText 控件表示文本输入类型的属性
A.
Android:inputType
B.
Android:text
C.
Android:digits
D.
Android:hint
【简答题】He’s working hard for fear that he__________. A．should fall behind B．fell behind C．may fall behind D．would fall behind
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