胸骨明显压痛或叩击痛常见的疾病是
A．上呼吸道感染
B．肺炎
C．慢性支气管炎
D．肺结核
E．白血病
参考答案：E
Write "Yes" or "No". 下列说法对吗？对说“Yes”，错说“No”。
( ) 1. A duck has wings.
( ) 2. Pandas live in a tree.
( ) 3. Giraffes eat leaves.
( ) 4. A rabbit has two long ears.
( ) 5. A cashiser works in a school.
( ) 6. A lion has a pouch.
臭氧层可被（）、（）、氮氧化物、甲烷等大气污染物破坏。
