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关税不具有国际收支效应。()

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亚当·斯密和李嘉图的贸易理论都是通过对具体实践的考察总结出来的。()

Before a senior executive officer retired from his company, he has an obligation to ______.

10年前,中国处于其中的世界经济形势对中国是非常有利的。()

A—audio control panel B—audio volume control
C—battery pack D—battery pack latch
E—CD-ROM drive F—diskette drive
G—external input device connector H—external monitor port
I—headphone jack J—left speaker
K—line-in jack L—liquid crystal display
M—memory door N—microphone
O—microphone jack P—modern connector
Q—PC card eject buttons R—PC card slot
S—power jack T—power switch
U—right speaker V—security keyhole
W—system-expansion connector X—system-status indicators
Y—track point buttons Z—track point stick
51. ()外接输入装置连接器 ()电源接口
52. ()系统状态显示 ()调制解调器接口
53. ()电源开关 ()外接显示器端口
54. ()液晶显示 ()耳机插口
55. ()送话器插孔 ()音量控制

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