单项选择题

Passage One

A. The Japanese mathematic teachers. B. Both the speaker and his German friend.
C. Both Americans and immigrants. D. The son of the speaker’s German friend.
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单项选择题
A. The strategy for airport security has been far from perfect. B. The equipments and system of airport security are very old. C. The officers of airport security are unskilled to deal with criminals. D. The technology alone is not enough to identify vicious intentions.
A. The strategy for airport security has been far from perfect.
B. The equipments and system of airport security are very old.
C. The officers of airport security are unskilled to deal with criminals.
D. The technology alone is not enough to identify vicious intentions.
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