改写下列句子。   

1．他们回来得这么晚，怎么会按时上学呢？    

     改成陈述句：                                                                                                           

2．工程师拿出来一根楔子。    

     改成“把”字句：                                                                                                      

     改成“被”字句：                                                                                                  

阻塞性黄疸(早期)临床生化测定的特点是()

A．血清中酯型胆红素含量升高

B．尿中无尿胆红素

C．粪中粪胆素原升高

D．尿中尿胆素原升高

E．尿中尿胆素升高