[单选题]CRH2、CRH380A系列动车组压装前，在弹簧下夹板上放置轴箱弹簧内外圈（弹簧外圈包括已预组了防雪罩），调整弹簧内外圈的相位差（弹簧内圈和弹簧外圈相位差（ ），且弹簧内圈和弹簧外圈之间间隙均匀，放置弹簧内圈时需要注意内圈起始位置与下夹板上的红色标记平齐。
A. 100度
B. 90度
C. 45度
D. 180度

The origin of the almighty dollar is in what is now the Czech Republic. In 1519 ,a silver mine near the town of Joachimstal literally "Joachim’s valley," from the German Tal, meaning valley began minting a silver coin called, unimaginatively, the Joachimstaler. The coin, which was circulated widely, became better known by its clipped form, the taler. In Dutch and Low German, the initial consonant softened to become daler. English adopted this form, eventually changing its spelling to the modern dollar.
In the American colonies, there was no standard currency. The coin that was in widest use was the Spanish Peso, known also as" Pieces of Eight" because it could be divided into eight pie-like pieces. The English colonists informally assigned the name dollar to this coin. In 1785, when the Continental Congress established U.S. currency ,they adopted dollar as name for the standard unit of currency ,at the suggestion of Governeur Morris and Thomas Je
A. Thomas Jefferson invented $ sign for US dollars.
B. The origin of the dollar is in the Czech Republic.
C. Spanish Peso was used widely in old American colonies.
D. The British central bank has once issued coins named dollars.