问题 填空题

______(x-3y)=9y2-x2

答案

∵9y2-x2=(3y-x)(3y+x),

∴(-x-3y)(x-3y)=9y2-x2

故答案为(-x-3y).

写句子

按要求变换句式。   

1.这比山还高比海还深的情谊,我们怎么能忘怀?(改为陈述句)  

                                                                                                                                                        

2.李宁严肃地对小明说:“如果你再迟到,我就一个人去。”(改为间接叙述)  

                                                                                                                                                        

3.因为我们是为人民服务的,所以,我们如果有缺点,就不怕别人批评指出。(改为反问句)

                                                                                                                                                         

4.他用慈祥的目光久久地注视着锅炉和刚吊上甲板的大木箱。(缩句)

                                                                                                                                                         

5.看到这美丽的校园,谁会不舒服呢?(给句子换个说法,不改变句子的原意,用两种方式)

                                                                                                                                                        

问答题 论述题