0.2%过氧乙酸溶液常用于()
A．空气消毒
B．浸泡餐具
C．医疗器械消毒
D．体温表的消毒
E．用于手的消毒
参考答案：E
下列不属于第三方物流公司的是（）。
A.UPS
B.EMS
C.DHL
D.京东快递
When an object is dropped, the number of feet N that it falls is given by the formula , where t is the time in seconds since it was dropped and g is 32.2, if it takes 5 seconds for the object to reach the ground, how many feet does it fall during the last 2 seconds ？（）
, where t is the time in seconds since it was dropped and g is 32.2, if it takes 5 seconds for the object to reach the ground, how many feet does it fall during the last 2 seconds ？（）