21、在Ⅱ类进近过程中，副驾驶的主要职责是？In CATⅡ approach，what is the responsibility of the F/O?
A.操纵飞机。 control the aircraft;
B.比照飞行参数和目视参考。compare the flight parameters and the visual references;
C.监控和报告飞行仪表和飞机状态。 monitor and report the instruments and aircraft status;
正确答案是C