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【单选题】
了物质的量浓度的概念后，你认为1 mol/L硫酸溶液的含义应是 [ ]A.
每1L水中含有1 mol H 2 SO 4
B.
每1L溶液中含1 mol H +
C.
将98 g H 2 SO 4 溶于1L水中所配成的溶液
D.
指每1L硫酸溶液中含有98g H 2 SO 4
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【单选题】示差分光光度法和一般分光光度法的不同点在于参比溶液不同。前者的参比溶液为
A.
溶剂
B.
蒸馏水
C.
在空白溶液中加入比被测试液浓度稍低或稍高的标准溶液
D.
在空白溶液中加入比被测试液浓度高的多的标准溶液
【单选题】Which is not the stressful moment in real life?
A.
Pay the bills.
B.
Prepare the meals.
C.
Earn more money.
D.
Play with the babies.
【简答题】原子吸收分析常用的火焰原子化器是由 组成。原子化器的主要作用是 。
【简答题】以下排序技术中属于交换类排序法的有________，属于插入类排序法的有________，属于选择类排序法的有________。 Ⅰ．简单插入排序 Ⅱ．冒泡排序 Ⅲ．希尔排序 Ⅳ．堆排序 Ⅴ．快速排序 Ⅵ．简单选择排序
【单选题】What do we know about the speaker's life in the past?
A.
It was stressful.
B.
It was colorful.
C.
It was peaceful.
D.
It was boring.
【单选题】Which of the following statements is NOT true of the stressful situation in modern life?
A.
To pay the mortgage.
B.
To commute to the office.
C.
To further one's qualifications.
D.
To resume digestion.
【单选题】Life is stressful, and complaining may be considered by many as an extension of being________normal.
A.
urgently
B.
absolutely
C.
casually
D.
clumsily
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