问题
单项选择题
以下哪种效应是N2受体激动效应:
A.肾上腺素分泌减少
B.睫状肌舒张
C.骨骼肌收缩
D.支气管平滑肌收缩
E.心率减慢
答案
参考答案:C
以下哪种效应是N2受体激动效应:
A.肾上腺素分泌减少
B.睫状肌舒张
C.骨骼肌收缩
D.支气管平滑肌收缩
E.心率减慢
参考答案:C
用方框中所给单词的适当形式填空,使短文通顺、正确、连贯(每个单词限用一次)。
…but I’m pretty healthy. I exercise every day, 51 when I come home 52 school. My 53 habits are pretty good. I try to eat 54 of vegetables. I eat fruit and drink milk every day. I 55drink coffee. Of course, I love junk food, 56 I eat it two or three 57 a week. Oh, and I sleep nine hours every night. So you see, I look after my 58 . And my healthy lifestyle 59 me get good grades. Good food and exercise help me to study 60 . |