以下（）物品若经常使用，易引起中毒？
A.带“釉上彩”的瓷器
B.锡壶
C.用废旧铝制品改制的餐具
D.竹筷
参考答案：A, B, C
On his way to the airport, it ________ him all of a sudden that he had forgotten her birthday.
A．hit
B．knocked
C．occurred
D．beat
为病人做痰培养时应选
A．干燥试管B．试管中加入抗凝剂C．无菌血培养容器D．无菌痰标本盒E．无菌蜡纸盒或容器
