进水中含有微量Na+时，I型强碱性阴树脂仍具有一定的除硅能力。（）
参考答案：对
The brave soldier was willing to risk _____ his life rather than _____ himself up to the enemy. [ ]
A. lost; give
B. losing; giving
C. losing; give
D. lose; giving
在委托代理中，代理人享有代理权的依据是什么？（ ）
A．委托合同
B．委托授权
C．委托合同和委托授权
D．委托合同或委托授权
