异丙肾上腺素激动β受体产生的血管效应是：A．脑血管收缩 B．冠脉收缩 C．皮肤黏膜血

用方框所给词的适当形式填空，使短文完整正确（每词限用一次）。(10分) 

take  be  by  near  one   subway . have   no   kilometer   twenty

My home is quite far away from school. It’s about fifteen小题1:_____ . I have to get up very early  every morning.小题2:____ , I walk to the bus stop. It 小题3:______ me about five minutes. Then I take the bus. Because I have 小题4:_____ time to eat breakfast at home. I always eat it on the bus. 小题5:_____minutes later, I get  off the bus. And then I take  another  bus or the subway. It takes me twenty  minutes 小题6:_______  bus and ten .minutes  by subway.I hardly(几乎不) ever take the 小题7:_______,. because  the subway station is far away from school.But the bus station is 小题8:_____ .If the bus is too crowded (拥挤), I小题9:_____ to take the subway. Although it 小题10:____ also crowded, the subway is faster than the bus.