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【单选题】
管壳式换热器中设置折流挡板,主要是为了( )。A.
增加对流传热系数
B.
增加壳程对流传热系数
C.
增加传热面积
D.
固定加热管
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举一反三
【简答题】A．He prefers a more expensive model. B．He's confused by the remote controls. C．He's eager to use it. D．He's not happy that he bought it.
【单选题】He presented a ______ of his model design to the Committee members for their approval.
A.
sketch
B.
model
C.
sample
D.
schedule
【单选题】对于从Employee表中选择记录的以下代码片段， Connection con=null; Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); con=DriverManager.getConnection("jdbc:odbc:ss","sa",""); ResultSet rs=stat.executeQuery("select * from Emp...
A.
PreparedStatement stat=con.createStatement();
B.
Statement stat=createStatement();
C.
PreparedStatement stat=createPreparedStatement();
D.
Statement stat=con.createStatement();
【简答题】A．Because he persuaded his workers to buy Model-T cars. B．Because Model-T was ugly and always black. C．Because Model-T was cheap but beautiful. D．Because Model-T was cheap and and he increased ...
【简答题】从企业内部来说，物流业务需要与下列哪些部门进行信息交换和传送?（ ）
【单选题】________at his model plane over the weekend，he didn’t complete it．A.As he worked hard###
A.
________at his model plane over the weekend，he didn’t complete it． A.As he worked hard
B.
Hard as he worked
C.
How he worked hard
D.
How hard he worked
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