根据回答写问句。

1. A:                                            ?

    B: John is 50 kg.

2. A:                                            ?

    B: I am 155 cm.            

3. A:                                             ?                                                                                      

    B: My legs are 76 cm long.

4. A                                             ?                                                                                            

    B: Sarah is 15 years old.

5. A:                                             ?

    B: I wear size 16.

常用开门器最大工作行程是100mm。