沙丁胺醇作用特点
A．可口服，也可吸人给药
B．选择阻断β2受体
C．选择激动β2受体
D．过量可致心律失常
E．扩张支气管
参考答案：A,C,D,E
Mr. White, who comes from____ European country, has formed the habit of attending _____church on Sundays.
A．an, the
B．an, /
C．a, /
D．a, a
WORD能否出菲林？
