我行保证金账户按客户分设账户管理，保证金与银行承兑汇票、保函一一对应，专款专用，严禁将保证金挪作他用或提前支取。
参考答案：对
The phone was ringing. However, Maria continued reading in her study nothing had happened. [ ]
A. as though
B. since
C. now that
D. even if
网孔式塔板的主要特点有（）。
A.效率高
B.效率低
C.生产能力大
D.操作范围窄
