管道接头处理要用螺丝拧紧,(),破漏的管道要即时更换和维护。
A.拧密实
B.拧好
C.受力均匀
D.结合好
参考答案:C
证券投资分析的意义包括( )。
A.提高投资决策的科学性,减少盲目性
B.对资产进行保值、增值
C.降低投资风险,提高投资收益
D.获得超额利润
E.预测证券价格的涨跌,指导投资行为
My son prefers us to email each other once a week spend half an hour on the phone every night.
A.other than
B.rather than
C.otherwise
D.instead of