聚磷腈主链结构是由磷和氧原子交替组成的高分子聚合物
A. 对
B. 错
Manual workers often receive much higher ______ than people who work in offices
A. gains
B. fees
C. payments
D. wages
His ______ kept his secret.
A. brothers
B. workmates
C. companions
D. comrades
His rise in status more than ______ the loss of money.
A. pays back
B. rewards
C. compensates for
D. values