下列说法在科学性上没有错误的是 A．硬水和软水的本质区别是_爱下问搜题

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问题选择题

下列说法在科学性上没有错误的是

A．硬水和软水的本质区别是硬水含有杂质、软水含杂质少

B．这种蒸馏水绝对纯净，其中不含任何离子

C．这种口服液含有丰富的氮、磷、锌等微量元素　

D．没有水就没有生命

答案

答案：D

硬水和软水的本质区别是硬水含有钙、镁离子等杂质，软水不含有钙、镁离子等杂质或含量很少，A不正确。蒸馏水中含有氢离子和OH^－，B不正确。N、P是常量元素，C不正确，所以正确的答案选D。

完形填空

A young mother set her feet on the pathway of the life. “Is the way long?”
And her guide said, “Yes, and the way is hard. And you will be old ____ you reach the end of it, but the end will be better than the beginning.” But the young mother was happy and would not ____ anything could be better than these years. So she ____ with her children and gathered flowers for them along the way and bathed with them in the clear springs. The sun shone on them, and life was good. And the young mother cried, “ Nothing will be ____ than this.”
Then the night came. And the storm (暴风雨) ____ them and the path was dark, and the children shook with ____ and cold. And the mother drew them close and covered them with her clothes, and the children said, “ Oh, Mum, we are not afraid, for you are ____, and we know that no harm (伤害) can come to us.” And the mother said, “This is better than the ____ of the day, for I have taught my ____ courage.”
And the morning came. There was a hill ahead, and the children ____ it and soon grew tired. And the mother was ____, too. But she said to the children, “ A little patience and we are there.” So the children climbed and climbed, and when they reached the top, they said, “Mum, we ____ not have done it without you.” And when the mother lay down to sleep that night, she ____at the stars and said, “This is a better day than the ____ , for my children have learned determination(决心) in the face of ____. Yesterday I gave them courage—today I gave them strength.”

D．shouldn’t

A．looked over

C．looked after

B．difficulties

单项选择题

企业基于雇佣关系，依照国家的强制法令及相关规定，以企业自身的支付能力为依托，向员工所提供的、用以改善其本人和家庭生活质量的各种以非货币薪酬和延期支付形式为主的补充性报酬与服务是指( )。

A．福利

B．奖金

C．工资

D．保险