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起重吊装索具采用编结连接时，编结长度不应小于（ ）倍的绳径，且不应小于300mm。

A.3
B.5
C.10
D.15
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In 2008, the United States Department of Agriculture (USDA) wanted to know if all the school lunches served to students were healthy. The answer was a big, fat NO!
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The USDA gives schools food and money to make lunches. But schools make up their own menus. Some make healthy lunches. Most do not. Now the USDA wants all schools to serve more healthy lunches. They want schools to follow the USDA's guidelines for balanced (均衡) meals.
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