--Would you mind if I opened the window?

-- ________. In fact, I was going to suggest you _______ it.

A．Yes; not did

B．Not at all; do

C．More or less; did

D．of course; do

具有同时阻断β₁和β₂受体的药物是

A．普萘洛尔
B．去甲肾上腺素
C．异丙肾上腺素
D．多巴胺
E．酚妥拉明