A.多样化 B.多元化 C.灵活性 D.多样性
A.adopt B.lay C.stick D.adapt
A.knowing B.known C.to be known D.having known
A.reality B.create C.spread D.theater
A.are advised not to give them aspirin B.should watch out for signs of Reye syndrome C.are encouraged to take them to hospital for vaccination D.should prevent them from mixing with people running a fever
A.children are allowed B.are children allowed C.children will allow D.will children allow
A. B. C. D.