长效的糖皮质激素药物有()
A.甲泼尼松
B.曲安西龙
C.地塞米松
D.泼尼松龙
E.倍他米松
参考答案:C, E
While cleaning the room yesterday, I _______ an old photo of my mother.
A.came out
B.came across
C.came about
D.came up with
某铜矿样品四次分析结果分别为24.87%、24.93%、24.69%、24.55%,其相对平均偏差是()。
A、0.114%
B、0.49%
C、0.56%
D、0.088%