低位乳牙好发于（）
A.下颌乳侧切牙
B.上颌第一乳磨牙
C.上颌第二乳磨牙
D.下颌第二乳磨牙
E.下颌第一乳磨牙
参考答案：D
The people had to work hard On their farms, because their lives ______ their crops.[ ]
A. depends on
B. depends
C. depend on
D. on
男性，40岁。患艾滋病住院，他用过的血压计不宜采用的消毒灭菌法是
A．0.2%过氧乙酸擦拭B．甲醛熏蒸C．环氧乙烷气体消毒D．0.1%苯扎溴铵擦拭E．高压蒸气灭菌
