采煤机的电动机轴承应每（）个月注一次油脂，每（）清洗更换一次油脂，不同牌号的油脂不得混合使用。
参考答案：3 半年
中长期公司贷款业务中，以下哪种贷款居多( )
A．流动资金贷款
B．银团贷款
C．房地产贷款
D．项目贷款
A．Educating their workers about the importance of staying home when sick.
B．Letting people telecommute so that they can stay at home.
C．Announcing disciplinary measures against those working when sick.
D．Fostering an environment to encourage and paying sick employees to stay home.
