句型转换：按要求完成下列句子。

1. There is a tree in the garden. (就划线部分提问)

     _____ in the garden?

2. He usually goes to Beijing by plane. (同上)

    _____ _____ he usually go to Beijing?

3. Art is my favorite subject. (改为同义句)

    I _____ art _____ of all subjects.

4. There is an old tea house near here. (改为复数形式)

    There _____ _____ old tea houses near here.

5. I don't like this motorcycle because it's too old. (就划线部分提问)

    _____ _____ you like this motorcycle?

胺碘酮的主要作用是

A．阻滞钠通道

B．阻滞β受体

C．促进K⁺外流

D．选择性延长复极过程(APD)

E．阻滞Ca²⁺通道