关于磁感应强度的理解，以下说法正确的是

A．由B=F/IL可知，电流为1A、长为1m的通电导线在匀强磁场中受力为1N时，则匀强磁场的磁感应强度大小就是1T  

B．磁场中一小段通电导线所受安培力的方向就是该点磁感应强度的方向

C．小磁针在磁场中静止时北极所指的方向就是该点磁感应强度的方向

D．磁场中某点的磁感应强度与该点是否放通电导线无关

There was music from my neighbor’s house through the summer nights. In his blue gardens men and girls came and went like moths among the whisperings and the champagne and the stars. At high tide in the afternoon I watched his guests diving from the tower of his raft, or taking the sun on the hot sand of his beach while his two motor-boats slit the waters of the Sound, drawing aquaplanes over cataracts of foam. On week-ends his Rolls-Royce became an omnibus, bearing parties to and from the city between nine in the morning and long past midnight, while his station wagon scampered like a brisk yellow bug to meet all trains. And on Mondays eight servants, including an extra gardener, toiled all day with mops and scrubbing-brushes and hammers and garden-shears, repairing the ravages of the night before.

(The passage above is taken from The Great Gatsby)

Questions:

A. What time does the story reflect

B. What does the novel evoke

C. What does Gatsby’s failure magnify