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完形填空 根据上下文和首字母将文章所缺单词补充完整。 A foreigner's first impression of the US is likely to be that everyone is in a rush-often under 1) p_________. City people always appear to be hurrying to get where they are going, 2) r_________ seeking attention in a store, or 3) e_________ others as they try to complete their shopping. Racing through daytime meals is part of the 4) p________ of life in this country. Working time is considered precious. Others in public eating-places are waiting for you to finish so they, too, can be 5) s_________ and get back to work within the time allowed. You also find drivers will be 6) a__________ and people will push past you.You will miss smiles, brief conversations, and 7) s___________ exchanges with strangers. Don't take it 8) p_________. This is because people value time 9) h_______, and they resent someone else "wasting" it 10) b__________ a certain appropriate point.
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【单选题】有关酶活性中心的描述错误的是
A.
是直接结合底物的结构区域
B.
活性中心内的必需基团有两类,催化基团和结合基团
C.
活性中心外必需基团与酶的活性无关
D.
活性中心受破坏,酶丧失催化活性
【单选题】What is the cousin of the man?
A.
A university student.
B.
A primary school student.
C.
A high school student.
D.
An adult.
【单选题】甲、乙和丙三人同时看好某只股票。上午9:25—10:00该股票交易价格区间为10.5—10.6元。甲于10:01以限价10.26元买100股,乙于10:01:20以限价10.26元买100股,丙于10:02以限价10.27元买100股。下午3:00该股票收盘价格为10.88元。盘面显示,当日股票最低成交价格为10.26元。请以股票竞价交易规则分析,甲、乙和丙三人今天买股票成交的可能性由大到小的排序...
A.
甲、乙、丙
B.
丙、甲、乙
C.
丙、乙、甲
D.
乙、丙、甲
【单选题】Xiao Wang()a university student next year.
A.
is
B.
will be
C.
is being
【单选题】有关酶活性中心的描述除哪项外,都是错误的
A.
酶的活性中心是指能与底物特异性结合并把底物转换为产物的空间结构区域
B.
酶的活性中心是由一级结构上相互临近的基团组成的
C.
酶的活性中心在与底物结合时不应发生构象改变
D.
没有或不能形成活性中心的蛋白质不是酶
E.
酶的活性中心外的必需基团也参与对底物的催化作用
【简答题】讨论函数 在点 处的连续性和可导性.
【单选题】甲、乙和丙三人同时看好某只股票。上午9:25—10:00该股票交易价格区间为10.5—10.6元。甲于10:01以限价10.26元买100股,乙于10:01:20以限价10.26元买100股,丙于10:02以限价10.27元买100股。下午3:00该股票收盘价格为10.88元。盘面显示,当日股票最低成交价格为10.26元。请以股票竞价交易规则分析,甲、乙和丙三人今天买股票成交的可能性由大到小的排序...
A.
甲、乙、丙
B.
丙、乙、甲
C.
丙、甲、乙
D.
乙、丙、甲
【单选题】What do you think the woman is?
A.
A university student.
B.
A landlady.
C.
A researcher.
D.
A repair woman.
【简答题】讨论函数y=3√x在x=0点处的连续性和可导性.讨论函数 点处的连续性和可导性 .
【单选题】The two cases—a university student stopped by the policeman and a young man applying for a job, reveal that______.
A.
the life of typical young men in Africa is not easy
B.
there are more conflicts in African countries
C.
tribalism is important in African society
D.
the application of a job is difficult in Africa
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