取某吡啶类药物约2滴,加水1ml,摇匀,加硫酸铜试液2滴与硫氰酸铵试液3滴,即生成草绿色沉淀。该药物应为 __________ 。
参考答案:尼可刹米
–Thank you for picking me up from the supermarket!
– _________.
A.With pleasure
B.None of your business
C.There’s nothing in it
D.Think nothing of it
汽车在平直的公路上以20m /s的速度做匀速直线运动,刹车后的加速度大小为5m /s2,则从刹车起,汽车在5s内的位移是[ ]
A.30m
B.40m
C.10m
D.0m