问题 单项选择题

牙板的发育时间是()

A.胚胎第2周

B.胚胎第3周

C.胚胎第5周

D.胚胎第6周

E.胚胎第7周

答案

参考答案:E

写句子

根据要求或提示写句子。

1.根据“希望”的意思造句。 

希望(希望所寄托的对象)                                                                       

2.大水冲走了八只大铁牛。 

(1)“把”字句:                                                            

(2)“被”字句:                                                            

(3)扩句:                                                                         

3.散场了,观众很有秩序地,争先恐后地拥出剧院。(修改病句)

                                                                                                                         

4.老师 说服 他  没有  完全  (组成四个意思不同的句子)

                                                                                                                        

                                                                                                                        

                                                                                                                        

                                                                                                                        

问答题 简答题