【单选题】语言形成的过程要经过以下()个阶段。
A.
声学阶段→语言阶段→语言阶段→语言阶段→生理阶段
B.
声学阶段→生理阶段→语言阶段→生理阶段→声学阶段
C.
声学阶段→语言阶段→声学阶段→生理阶段→语言阶段
D.
语言阶段→生理阶段→语言阶段→生理阶段→声学阶段
E.
语言阶段→生理阶段→声学阶段→生理阶段→语言阶段。
【单选题】Three fourths of the suce of the earth ___ covered withwater.
【单选题】Three fourths of the suce of the earth ______ covered with water.
【简答题】论述活性污泥法中丝状菌污泥膨胀的概念、危害和评价指标
【简答题】were/is (1)Three fourths of the teachers present _____ against the plan. (2)Three fourths of the suce of the earth ______ covered with water.
【单选题】一个1岁2月幼儿出现呼吸困难,可能原因包括
【简答题】衬叶可以修剪变曲造型吗?都有哪些形式和方法?
【单选题】Three fourths of the teachers _____ against the plan,and three fourths of the plan _____ hard for them to carry out.