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【单选题】
有人认为近几年来大量农村人口涌入城市打工，造成了城市社会秩序的混乱，治安状况下降。可以说，允许农村人口流入城市有害而无益，因此城市的农村人口，并限制其进城打工。 以下哪项若为真，则最能驳斥上述观点？（ ）A.
该研究者的理论研究和所进行的实验在时间上不相一致
B.
人的免疫系统与心理健康关系密切
C.
一些具有高免疫系统的人，在心理测试中，与具有普通免疫系统的人得分不同
D.
一般来说，强烈的压力首先引起精神疾病，然后降低免疫系统的活动水平
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举一反三
【单选题】According to the given article, which of the following statements is NOT true?
A.
Pop music is being blamed by the United Nations for the dramatic rise in drug abuse worldwide.
B.
Pop music is by far the most influential trend-setter for young people of most cultures.
C.
The UN study also blames the media for its description of certain drug issues— especially the use of marijuana and issues of liberalization and legalization.
D.
The present study focuses on the issue of demand increase and prevention within an environment that has become tolerant of drug abuse.
【单选题】The main idea of the last paragraph is
A.
the treatment of the skin cancer.
B.
the prevention of the skin cancer.
C.
the parts of the body where cancer is most likely to develop.
D.
the lotions that work best in fighting against the skin cancer.
【单选题】He became a famous writer when he was ______ .
A.
in his fifty
B.
in his fifties
C.
in fifty years old
【简答题】弹出“填充”对话框的快捷键是什么?
【多选题】以下( )可以作为紫外-可见分光光度法定性的依据。
A.
比较吸收光谱的形状
B.
比较最大吸收波长
C.
比较吸光系数值
D.
比较各吸收峰的波长位置
E.
比较吸收峰的数目
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