【简答题】被霉菌污染的粮食会产生黄曲霉素(C 17 H 12 O 6 ),人类的特殊基因在黄曲霉素作用下会发生突变,继而诱发癌症. (1)黄曲霉素属于______(填“无机物”或“有机物”),它由______种元素组成,各元素的质量比是______. (2)由于化学物质使用不当,给人印象不佳的化学名词越来越多:苏丹红、三聚氰胺、….下列做法不会危及人体健康的是______(填序号). a.用甲醛浸泡海鲜产品...
【单选题】Read the following paragraph from the section "Slash Claws Are Made For ... Slashing." Swartz pointed out that W.A.T.C.H. has helped remove dozens of toys from stores since the 1970s. He also said pro...
A.
Swartz says warning labels do not make toys safer but force parents rather than toy companies to be responsible for the dangers.
B.
Swartz says warning labels do not make toys safer but give only guidelines that are difficult for parents to understand.
C.
Swartz says toy companies are responsible for making toys safe for children but are interested only in making money.
D.
Swartz says toy companies are making toys safer by putting instructions on them so that parents know how to use them.