金属塑性加工根据加工时的温度分为().
A.热加工
B.冷加工
C.半液态加工
D.半固态加工
E.温加工
参考答案:A, B, C, E
利用人工合成的性引诱剂诱杀害虫的雄性个体,破坏了种群正常的性别比例,该害虫的种群密度短期内将[ ]
A.明显增加
B.明显减少
C.先减后增
D.相对稳定
In order to implement a more expansionary monetary policy, would an effective strategy for a government’s central bank include: Raising reserve requirements Selling the government securities()
A. No No
B. No Yes
C. Yes No