1.  >>  河南成教 / 食品卫生与检验
 河南成教 / 食品卫生与检验
正确率:100%

[单选题]

双脱氧链末端终止法测序反应与普通体外合成DNA反应的主要区别是( )。





A.双脱氧链末端终止法测序反应体系中还需加入ddNTP


B.dNTP的浓度不同



C.dNTP的种类不同



D.DNA聚合酶不同
 参考答案:
 佳题速递:
  • 针对女性消费群体采取的心理营销策略中,下列说法不正确的是()。开展多种形式的促销活动讲求服务艺术,提高服务水平制定更便宜的商品价格注重商品包装的外观设计消费心理学
  • 实变函数
  • 《活动推进表》中,运营者需要计算活动周期并设计各阶段的时间,其中包括筹备期、预热期、进行期、发酵期,可以在表中标出对应时间。是否新媒体运营推广技术
  • 6[多选题] 下面属于决策的信息系统有( )。 A.CEO使用的信息系统 B.ERP系统 C.战略信息系统 D.供应链管理系统现代通信原理
  • 2[填空题] Ancient Greek philosopher Aristotle viewed laughter as “a bodily exercise precious to health.” But ­­­__1___some claims to the contrary, laughing probably has little influence on physical fitness Laughter does __2___short-term changes in the function of the heart and its blood vessels, ___3_ heart rate and oxygen consumption But because hard laughter is difficult to __4__, a good laugh is unlikely to have __5___ benefits the way, say, walking or jogging does. __6__, instead of straining muscles to build them, as exercise does, laughter apparently accomplishes the __7__, studies dating back to the 1930’s indicate that laughter__8___ muscles, decreasing muscle tone for up to 45 minutes after the laugh dies down. Such bodily reaction might conceivably help _9__the effects of psychological stress. Anyway, the act of laughing probably does produce other types of ___10___ feedback, that improve an individual’s emotional state. __11____one classical theory of emotion, our feelings are partially rooted ____12___ physical reactions. It was argued at the end of the 19th century that humans do not cry ___13___they are sad but they become sad when the tears begin to flow. Although sadness also ____14___ tears, evidence suggests that emotions can flow __15___ muscular responses. In an experiment published in 1988,social psychologist Fritz Strack of the University of würzburg in Germany asked volunteers to pick  a pen either with their teeth-thereby creating an artificial smile – or with their lips, which would produce a(n) disappointed expression. Those forced to exercise their smiling muscles reacted more exuberantly to funny cartons than did those whose mouths were contracted in a frown, mentioning that expressions may influence emotions rather than just the other way around Similarly , the physical act of laughter could improve mood. 1.[A]among       [B]except        [C]despite       [D]like 2.[A]reflect       [B]demand       [C]indicate       [D]produce 3.[A]stabilizing    [B]boosting       [C]impairing     [D]determining 4.[A]transmit      [B]sustain        [C]evaluate      [D]observe 5.[A]measurable   [B]manageable    [C]affordable     [D]renewable 6.[A]In turn       [B]In fact        [C]In addition     [D]In brief 7.[A]opposite     [B]impossible     [C]average       [D]expected 8.[A]hardens      [B]weakens       [C]tightens      [D]relaxes 9.[A]aggravate     [B]generate       [C]moderate     [D]enhance 10.[A]physical     [B]mental        [C]subconscious  [D]internal 11.[A]Except for   [B]According to   [C]Due to        [D]As for 12.[A]with        [B]on           [C]in           [D]at 13.[A]unless      [B]until          [C]if           [D]because 14.[A]exhausts    [B]follows        [C]precedes     [D]suppresses 15.[A]into        [B]from          [C]towards      [D]beyond英语(二)
  • 员工的绩效高低取决于员工受激励的程度。( )管理方法与艺术