看图和句子，完成下列的对话。

1. —Is this a pencil?

    —_____. 

2. —What's that, Rose?

    —_____.

3. —Is this your book?

    —_____. It's his book.

4. —Is that your ruler, Linda?

    —Yes. My ruler is blue. _____.

5. —What's this in English?

    —It's an eraser.

    —____________________?

    —E-R-A-S-E-R, eraser.

ACEI和AngⅡ受体拮抗药在治疗高血压方面有何异同点？