下列各种动物中，出现在澳大利亚国徽上的是[ ]
A．鸭嘴兽
B．考拉
C．鸸鹋
D．鸵鸟
答案：C
He ＿＿＿articles for our wall-newspaper these three years, and he ＿＿＿about forty articles.
A．has been writing； has written
B．has been writing； wrote
C．is writing； has been writing
D．has written； has written
呼吸频率减慢，节律改变的呼吸困难常见于（）
A.急性喉炎
B.支气管哮喘
C.左心衰
D.ARDS
E.颅内高压
