460减去一个数得241，这个数是多少？
460-241=219
答：这个数是219．
According to the passage, inland waterway travel was most popular in the early 1800s.
OceanStor 5500 V3的SPC-1认证值是（）。
A.5万IOPS
B.10万IOPS
C.20万IOPS
D.30万IOPS
