In a barter trade, only one L/C is to be opened if the payment is agreed to be made by L/C.
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In a tender business, a number of bidders compete against one another for.a deal with favorable terms in their own bid.
A. 对
B. 错
污泥浓缩法去除的是污泥中的( )
A. 自由水
B. 表面吸附水
C. 毛细水
D. 内部结合水
关于污泥的稳定,下列说法正确的是( )
A. 厌氧消化的反应速率比好氧消化快
B. 好氧消化适合于污泥量大的场合
C. 厌氧消化比好氧消化能耗高
D. 石灰可用于污泥稳定
污泥的化学稳定法有()稳定法、()稳定法和()稳定法。