American young people may make their boldest____the tradition, and then gradually they may master the tradition.
A. addiction to
B. superiority over
C. departure from
D. conception of
合金结构钢中加入Cu和P的作用主要是（）
A. 强化铁素体
B. 提高抗大气腐蚀能力
C. 细化品粒和弥散强化作用
D. 增强其韧性
下列属于中央银行负债业务的是
A. 再贷款
B. 购买各种证券
C. 黄金外汇储备
D. 发行流通中的货币
It is necessary to do some assignments to _________ what is learned in class.
A. strengthen
B. fix
C. fasten
D. reinforce
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