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【单选题】
Rise in Number of Cancer Survivors Cancer is the second leading cause of death in the United States, after heart disease. In the (51), it was often considered a death sentence. But many patients now live longer(52)of improvements in discovery and treatment. Researchers say death(53)in the United States from all cancers combined have fallen for thirty years. Survival rates have increased for most of the top fifteen cancers in both men and women, and for cancers in(54). The National Cancer Institute and the Centers for Disease Control and Prevention studied the number of cancer survivors. A cancer survivor is defined(55)anyone who has been found to have cancer. This would include current patients. The study covered the period(56)1971 to 2001. The researchers found there are three(57)as many cancer survivors today as there were thirty years ago. In 1971, the United States had about three-million cancer(58). Today there are about ten-million. The study also found that 64% of adults with cancer can expect to still be(59)in five years. Thirty years ago, the five-year survival rate was 50%. The government wants to (60)the five-year survival rate to 70% by 2010. The risk of cancer increases with age. The report says the majority of survivors are 65 years and (61). But it says medical improvements have also helped children with cancer live(62)longer. Researchers say 80% of children with cancer will survive at least five years after the discovery. About 75% will survive at (63)ten years. In the 1970s, the five-year survival rate for children was about 50%. In the 1960s, most children did not survive cancer. Researchers say they(64)more improvements in cancer treatment in the future. In fact, they say traditional cancer-prevention programs are not enough anymore. They say public health programs should also aim to support the (65)numbers of cancer survivors and their families.
A.
past
B.
present
C.
future
D.
old
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【单选题】甲公司与乙公司订立了一份总货款额为20万元的设备供货合同。合同约定的违约金为货款总值的10%。同时,甲公司向乙公司给付定金5000元,后乙公司违约,给甲公司造成损失3万元。乙公司应依法向甲公司支付( )。
A.
2万元
B.
2.5万元
C.
3万元
D.
3.5万元
【多选题】以下关于 GC 的描述,正确的是( )
A.
GC 主要用于分离能够被气化、热稳定性好的物质
B.
氮气、氢气、氦气是 GC 中常用的流动相
C.
GC 是一种分离效能很高的仪器分析方法
D.
气 - 液色谱 的分离原理是不同组分在固定相上的 吸附能力 有差异
E.
GC 可用于微量成分的分析
【多选题】职场不可以交谈的内容有
A.
国家秘密
B.
私人问题
C.
议论同事
D.
合同问题
【简答题】介绍的要领 一是确定 ________ 。在介绍时,不要随心所欲地漫谈,也不要经常变化主题。 二是明确 对象 。介绍者不仅要根据信息受众的不同年龄、身份、职业等确定不同的介绍内容,采用不同的表达方式,还应当根据交际场合、目的的不同,选择相应的介绍内容和适合的表达方式。 三是选择 内容 。介绍的内容要典型、新颖,可以引起听众的兴趣。 四是谋划 结构 。
【多选题】《环境空气和废气 气相和颗粒物中多环芳烃的测定 高效液相色谱法》(HJ 647-2013)关于样品保存规定,以下描述正确的是()
A.
样品采集后应避光于4℃以下冷藏,7日内提取完毕
B.
样品采集后应避光于-15℃以下保存,30日内完成提取
C.
样品采集、贮存和处理过程中受热、臭氧、氮氧化物、紫外光都会引起多环芳烃的降解,需要密闭、低温、避光保存
D.
制备好的样品在4℃以下冷藏保存,30日内完成分析
【单选题】下列关于色谱分离法描述正确的是
A.
析和薄层层析几乎适用于所有物质的快速检测分析
B.
析和薄层层析的介质通常可以反复使用,因而与柱层析相比价格便宜
C.
析的介质颗粒通常要尽量小,分离效果更好
D.
析所用的柱子越长分离效果越佳,所以当分离效果不好时,改变柱长一定能提高分离效率
【多选题】以下对色谱分析法描述正确的是
A.
色谱分析法是一种物理或物理化学的分离分析方法
B.
色谱法通常利用某一特定的色谱系统(如 TLC , HPLC 或 GC 系统等)进行分离分析
C.
分配系数的不同使不同组分在色谱中得到分离
D.
色谱分析法的定性能力高于化学法和光谱法
【多选题】根据《空气 醛、酮类化合物的测定 高效液相色谱法》(HJ 683-2014)的样品运输和保存规定,以下描述正确的是()
A.
采样管应使用密封帽将两端管口封闭,并用锡纸或铝箔将采样管包严
B.
采样管应在低温(<4℃)保存与运输
C.
如果不能及时分析,应保存于低温(<4℃)下
D.
保存时间不超过30天
【多选题】根据《固定污染源排气中苯并(a)芘的测定 高效液相色谱法》(HJ/T 40-1999)的样品采集和保存规定,以下描述正确的是()
A.
采集好的样品须避光保存或可用黑纸包好
B.
样品放在3~5℃冷藏箱中保存
C.
采样后应尽快在24h内进行前处理
D.
样品前处理完成后在1个月内分析完毕
【多选题】职场不可以交谈的内容()。
A.
国家秘密
B.
私人问题
C.
议论同事
D.
合同问题
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