句型转换。

1. I'd like a small bowl of noodles.(对画线部分提问)

     What______bowl of noodles______you like?

2. —Helen wrote a letter yesterday．(对画线部分提问)

    —______Helen______yesterday?

3. Open the door, please.(改为否定句)

     Please______ open the door.

4. Do you know how to get to the post office?(改为同义句)

    Do you know______  the post office?

5. How do you like your vacations?  (改为同义句)

     do you ______ your vacations?

将牡丹种子随“神舟三号”飞船绕地球飞行，种子会出现某些地球上无法获得的变异，而大大提高牡丹的品种质量，这种育种方式是(    )

A．杂交

B．诱导基因育种

C．人工选择育种

D．诱导细胞分裂