呼吸急促困难，喉中痰鸣的是（）
A.短气
B.夺气
C.少气
D.喘
E.哮
参考答案：E
-When would it be ________ for you to go to the science museum with me?
-I am free this Friday afternoon. Let's meet at 2 p．m. at the school gate.[ ]
A．familiar
B．pleasant
C．necessary
D．convenient
酸奶：奶酪（）
A．木头：桌子
B．豆浆：豆腐
C．干冰：冰块
D．土壤：沙尘
