治疗肺炎支原体肺炎宜选用（）。
A．青霉素
B．头孢呋肟
C．丁胺卡那霉素
D．红霉素
E．链霉素
参考答案：D
44. We must _____ good relations with our classmates because co-operation is essential to us, modern people.
A．do
B．put
C．build
D．Set
长周期变星
