不再能够为企业带来经济利益的无形资产，其摊余价值应当全部转入当期损益。( )
参考答案：对
As soon as the manager entered his office, he began to_____the telephone book on his desk.
A．look up
B．look into
C．look upon
D．look through
用铜盐防治鱼病或消除有害藻类时，如果水的硬度较高，铜盐的用量应该（）
A.适当增加
B.适当减少
C.与其他池塘一样
D.以上都不是
