某地区新建一座大型自来水厂，主要单位工程有沉淀池、过滤池、消毒池等，整个工程由W建筑

句型转换. (共20分，,每题2分)

小题1:His twin brother is driving a car. (用often 改写句子)

                                                                      .

小题2:The apples are two yuan a kilo. (对划线部分提问)

                                                                      .

小题3:He always goes to school on foot. (对划线部分提问)

                                                                      .

小题4:he, friends, now, his, with, play, football. (连词成句，并用正确时态)

                                                                     .

小题5:I think he is coming tomorrow. (否定句)

                                                                     .

小题6:It isn’t necessary to do housework.(同义句)

                no need to do chores.

小题7:Tom found an old man was lying on the street.(改为简单句)

Tom found an old man       on the street.

小题8:While John was taking photos, Mary bought a drink.(同义句)

                                                                .

小题9:What were you doing when the rainstorm came?(同义句)

What were you doing                             rainstorm?

小题10:Could I use your computer? (做简单回答，并给出理由)

                                                       .

磁盘处于写保护状态时，可进行的操作是( )。

A．只能读盘不能写盘

B．只能写盘不能读盘

C．既能读盘也能写盘

D．不能读盘也不能写盘

企业在使用一机多票开票子系统V6.15开票时，若系统提示“发票明细区满抄税提示”，下一步应（），才能保证可以继续正常开票。

A.直接执行抄税处理

B.执行数据清理后再执行抄税

C.先执行初始化后再执行抄税

D.属于系统软件BUG，无法解决

电路如图8-2-17所示，已知流过R₁的电流I₁=2A，若恒压源单独作用时流过R₁的电流，I'₁=lA，则恒流源单独作用时流过R₁的电流I''₁为（）A。

A．-1

B．-2

C．1

D．3

当出现故障码0773时（右侧气缸列前氧传感器信号偏稀，P2A00），以下哪些步骤不应该做？（）

A.检查排气系统是否有泄漏

B.检查前后氧传感器

C.检查车架侧与氧传感器上的插头

D.更换发动机电脑