属β2受体激动剂是()
A.沙丁胺醇
B.色甘酸钠
C.山莨菪碱
D.二丙酸倍氯米松
E.酮替芬
参考答案:A
The “Chinese Dream” is ______ dream to improve people’s well-being and ______ dream of harmony, peace and development.
A.the; a
B.a; a
C.a; the
D.the; the
KM、BALB/c小鼠等是常用的封闭群小鼠。