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【单选题】
下列广告语在科学性上没有错误的是（）A.
XX牌八宝粥由桂圆、红豆、糯米等精制而成，不含糖，适合糖尿病人食用
B.
请放心饮用XX系列饮料，该饮料绝对不含任何化学物质
C.
服用鱼肝油（富含维生素D.有助于您的宝宝骨骼健康，促进骨骼发育
D.
这种口服液含有丰富的N、P、Zn等微量元素
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皮皮学刷刷变学霸
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【单选题】{Page} The Great Newspaper War Up until about 100 years ago, newspapers in the United States appealed only to the most serious readers. They used no illustrations and the articles were ______ (51) pol...
A.
about
B.
in
C.
with
D.
of
【单选题】针下挑时,( )下压使针刺穿布面。 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
大拇指
B.
食指
C.
中指
D.
无名指
【简答题】Joseph Goldberger was a doctor for the Unite States Public Health Service. In 1912, he began to study a disease that was killing thousands of people in the South. The disease was pellagra(烟酸缺乏病). Doct...
【简答题】阅读理解。 Do you want to say that what you think in a letter to Jimmy Carter, president of the United States? You will get an answer from him-written in ink, not typed-after only a few days. Jimmy Carter ...
【单选题】听力原文： The Unite Nations (UN) is the largest organization on the earth because it involves most of the countries in the world. The UN has the most important goal in the world z peace. Although all peop...
A.
Peace.
B.
Trade.
C.
Health.
D.
Wealth.
【单选题】三相桥式有源逆变电路 中如果逆变角β小于换流重叠角γ,即β<γ时,晶闸管T1、T2换流还未结束,电路的工作状态到达uA与uB交点P,从P点之后,uA将高于uB ,晶闸管T2承受反压而重新关断,而应该关断的T1却承受正压而继续导通,从而造成 。
A.
逆变成功
B.
逆变失败
【简答题】当以色列前总理沙龙昏迷不醒的时候，病榻旁医生为他播放了谁的音乐以期能够唤醒沉睡的沙龙？
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