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【简答题】
Karen MacInnes had spent nine months in the hospital. As she grew weaker, the 16-year-old girl asked her parents, “Am I going to die?” Her mother told Karen the truth. After learning the bad news, all Karen wanted was to go home. Her parents decided to satisfy her wish --- no matter that medical fund (基金) , which had helped pay for Karen’s hospitalization, would not cover any of the full time medical care she would need at home. When she was carried through her front door, Karen smiled for the first time in months. A friend of the MacInnes family, Sheila Petersen, knew of this and offered to help. She volunteered not only to find nurses, but also to raise money for Karen’s care. Money was received from so many people that Sheila created a fund, “Friends of Karen”. After leaving the hospital, Karen lived for 11 months. “And those months were happy ones for her,” says her mother, “thanks to Sheila.” Even after Karen died, people kept sending money. Sheila put it into the fund, tried to find someone else who needed help. By last month, Friends of Karen was helping 70 families. “I still have a relationship with each family,” says Sheila. “We have four children who are near death now, and I want to be there for them.” Sheila admits the work is sometimes difficult, but says, “the smile on a child’s face makes it all worthwhile (值得的) .”
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参考答案:
举一反三
【单选题】( )方法适用于消解测定汞的水样。
A.
硝酸消解法
B.
硝酸 - 高氯酸消解法
C.
硫酸 - 高锰酸钾消解法
D.
硝酸 - 硫酸消解法
【判断题】原子吸收光谱法选用的吸收分析线一定是最强的共振吸收线
A.
正确
B.
错误
【单选题】气相色谱分析中, _______ 对两种物质的分离度没有影响。
A.
增加柱长
B.
改用更灵敏的检测器
C.
进样速度慢
D.
柱温变化
【简答题】硝酸消解法适用于__的水样。 硝酸-高氯酸消解法适用于含__,__的水样
【判断题】硝酸-高氯酸消解法适用于消解含难氧化有机物的环境样品,如高浓度有机废水、植物样品、污泥。
A.
正确
B.
错误
【简答题】气相色谱分析中计算理论塔板数和有效塔板数的方法有何不同?两种方法哪一种更符合实际情况,为什么?
【单选题】将蛋白质溶液的PH值调节到等于蛋白质等电点时,可使
A.
蛋白质稳定性增大
B.
蛋白质表面净电荷不变
C.
蛋白质发生变性
D.
蛋白质稳定性减小,易于沉淀
【判断题】原子吸收光谱法选用的吸收分析线一定是最强的共振吸收线
A.
正确
B.
错误
【单选题】注塑机按机器的传动方式又可分为液压式、机械式和( )。
A.
气动式
B.
手动
C.
螺杆式
D.
液压-机械(连杆)式
【单选题】不适用于易生成难溶硫酸盐组分(如铅、钡、锶)的水样的消解法是( )。
A.
硝酸消解法
B.
硝酸-高氯酸消解法
C.
硝酸-硫酸消解法
D.
硝酸-盐酸消解法
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