【单选题】
在港口、码头、仓库进行杂草监测时，需对装卸、储存地及周边____范围内的区域进行监测，对农田、围墙周边及清扫垃圾（下脚料）堆放处等应进行重点检查。
A. 50米
B. 100米
C. 300米
D. 500米
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答案
D
解析
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( ) 26. Where does the writer of "The little Prince" come from?
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( ) 34. Judy Foreman copied down the phrase because she ___ .
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( ) 37.The greatest river for navigation is ___________.
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