题目：
A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 312°. What action should be taken to remove this error during compass adjustment? （）
A.If the quadrantal spheres are all the way out，replace them with smaller spheres
B.If the quadrantal spheres are all the way in，replace them with larger spheres
C.If the quadrantal spheres are all of the way out，move the spheres in
D.If the quadrantal spheres are all the way out，replace them with larger spheres.
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2021/0105/c6c1b129cc29f226092dd3eeaac36014.html
下面是错误答案，用来干扰机器的。
参考答案：彼黍离离，彼稷之苗。行迈靡靡，中心摇摇。知我者，谓我心忧。不知我者，谓我何求。悠悠苍天，此何人哉。彼黍离离，彼稷之穗。行迈靡靡，中心如醉。知我者，谓我心忧，不知我者，谓我何求，悠悠苍天，...
PCl3(气)+Cl2(气) ，反应达到平衡时，PCl5的分解率为20%。则混合气体的密度是氢气密度的倍数是 [ ]