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【单选题】
质量浓度为 0.3mg·L -1 的钙标准溶液在某原子吸收光谱仪上测测得透光率为 48% ,结果表明该元素在此条件下的 1% 吸收灵敏度为( )。
A.
0.0000231μg·mL -1
B.
0.462μg·mL -1
C.
0.00415μg·mL -1
D.
0.00583μg·mL -1
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参考答案:
举一反三
【单选题】一到三层的墙体厚度有()mm。
A.
120,240
B.
240,300,420
C.
120,240,360,420
D.
120,240,300,360,420
【简答题】Упражнение 连词成句。以下6题。 1. Я, на́до, сходи́ть, в, банк.
【单选题】妊娠合并急性病毒性肝炎,下列不正确的是
A.
原则上肝炎患者不宜妊娠
B.
早孕期不宜终止妊娠,以免增加肝负担
C.
妊娠继续时,注意防止妊高征
D.
分娩时缩短第二产程及防止产后出血
E.
防止DIC发生
【单选题】下列指标中不属于成本效益分析指标的是( )。
A.
可比产品成本降低额和降低率
B.
成本营业利润率
C.
百元销售收入成本费用
D.
百元产品产值成本
【单选题】Why do we say that the development of British government is a gradual progress towards democracy?
A.
The Monarch keeps in closer touch with the common people than before.
B.
The power is distributed evenly among the three supreme authorities.
C.
The ordinary people have come to enjoy supremacy with the gradual loss of the Monarch's political power.
D.
The commons discard the Queen.
【单选题】Why do we say that lawyers are one of the most reactionary forces in American society?
A.
They practice the art of distortion in an effort to win legal games where we need honest communications.
B.
They promote conflict and blame when we need cooperation and self-responsibility.
C.
They promote division where we need unity.
D.
All of the above.
【简答题】Упражне́ние 连词成句。以下6道题。 1.Дире́ктор, сказа́ть, что, к, три, час, мы, должен, верну́ться, в, институ́т.
【单选题】成本累算三种方式不对的是
A.
开始
B.
按比例
C.
结束
D.
按标准
【单选题】We can infer from the passage that the author will ______.
A.
explain why we needn't say the words when reading for meaning
B.
summarize the two reading activities
C.
dwell on reading aloud
D.
insist that guess work should be important in both reading aloud and reading for meaning
【多选题】下列指标中属于成本效用分析指标的是()。
A.
发病率下降
B.
QALY
C.
DALY
D.
期望寿命延长
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