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举一反三
【简答题】After she finished __________(write) the article, she went to the post office to send it away.
【简答题】I went to a local post office to send a gift to Florida yesterday afternoon. When I __1 _ the door, there were many people waiting there. A bit 2 , I decided to calmly wait for my turn to place the p...
【单选题】已知 RLC 串联电路中, R=16 Ω ,X L =4 Ω, X c =16 Ω , 则电路的总阻抗为()。
A.
36 Ω
B.
16-j12 Ω
C.
16+j20 Ω
D.
16+j12 Ω
【简答题】设f(x，y)为连续函数，且对任意平面曲线C，都有 ，试证f(x，y)=0
【单选题】________是Windows7中的高级视觉效果,其特点是具有透明的磨砂玻璃效果、精致的窗口动画和新窗口颜色。
A.
个性化
B.
桌面背景
C.
小工具
D.
Aero效果
【单选题】She went to the post office to mail a ______.
A.
delivery
B.
content
C.
message
D.
package
【简答题】设f(x)为连续函数，且对一切A＞0， 收敛,证明：对任意b＞a＞0有
【简答题】After she _____ (write) the letter, she went to the post office.
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