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【简答题】
根据抗原将链球菌分成A、B、C、D、E等18个群,对人致病的主要属于____群。
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反馈参考答案：
举一反三
【单选题】9 一质点作简谐振动 , 其速度随时间变化的规律为 v=- Acos t , 则质点的振动方程为
A.
x=Asin t
B.
x=Acos t
C.
x=Asin( t+ )
D.
x=Acos( t+ )
【单选题】医疗保健机构提供的母婴保健指导的内容包括
A.
对有些精神病的预防提供医学意见
B.
对孕妇提供营养方面的指导
C.
对碘缺乏病等地方病的发病原因、治疗和预防方法提供医学意见
D.
对孕妇提供心理方面的指导
E.
对指定传染病的发病、治疗和预防方法提供医学意见
【单选题】Riding on the swings and playing with the ducks in the pond _____ our children’s greatest pleasures when we took them to the park.
A.
is
B.
were
C.
was
D.
are
【单选题】The Boy Who Fell from The MayflowerThe Boy Who Fell from The Mayflower (Or John Howland’s Good Fortune) is a beautifully illustrated children’s book that tells the imagined story of a real-life passen...
A.
A novel.
B.
A science fiction.
C.
A magazine.
D.
A website.
【单选题】The Boy Who Fell from The MayflowerThe Boy Who Fell from The Mayflower (Or John Howland’s Good Fortune) is a beautifully illustrated children’s book that tells the imagined story of a real-life passen...
A.
He was an adult.
B.
He learned what it meant to take advantage of others.
C.
He is the hero of P. J . Lynch’s book.
D.
He was a servant of P. J . Lynch.
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