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【单选题】
(2010年)已知氧气的表压为0．15MPa，环境压力0．1MPa，温度123℃，钢瓶体积0．3m3，则计算该钢瓶质量的计算式m=0．15×106×0．3／(123×8314)中( )。A.
一处错误
B.
两处错误
C.
三处错误
D.
无错误
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反馈参考答案：
举一反三
【多选题】对于 gma 的说法恰当的是
A.
随着 sigma 水平的提高，不良率匀速减小
B.
过程离散程度越小， sigma 水平越高
C.
gma 水平的不良率 0.002ppm 是建立在分布中心与公差中心重合的条件上的，事实上，这个条件在实际中往往不满足
D.
gma 水平意味着质量标准下限到上限总共有 12 个标准差的距离
【简答题】书P11页习题二答案上传
【多选题】Which of the following statements about the synthesis of yeast genome are correct?
A.
In 2009, the first synthetic yeast genome project (Sc. 2.0 project) was launched to redesign and chemically synthesize the entire Saccharomyces cerevisiae genome.
B.
In 2011, the right arm of chromosome 9 & the left arm of chromosome 6 were successfully chemically synthesized.
C.
In 2017, five redesigned yeast chromosomes were completed; this accomplishment represents over one-third of the Sc. 2.0 project. During this project, scientists gradually established basic principles and methodologies for the design and synthesis of yeast artificial chromosomes.
D.
BioStudio, a software for design and reprogramming of a complete genome on computers, has also been published. Recently, 16 natural chromosomes of S. cerevisiae were successfully fused into a single chromosome, similar to that found in prokaryotic cells; the artificial S. cerevisiae still has normal cellular functions.
【单选题】I型超敏反应的特点不包括
A.
发作迅速
B.
有明显的个体差异和遗传素质
C.
主要表现为毛细血管扩张、通透性增加、平滑肌收缩
D.
常引起严重的组织细胞损伤
E.
发作可分为速发相和迟发相
【简答题】表示大气物理状态的参数主要是
【多选题】对于gma的说法恰当的是________。
A.
过程散布越小， sigma 水准越大。
B.
gma 意味着质量下限到上限总共有 12 个标准差的距离
C.
随着 sigma 水准的提高，不良率匀速减小
D.
gma 水平的不良率 0.02 ppm 是建立在分布中心与公差中心重合的条件上的，事实上，这个条件在实际中往往不满足
【简答题】For the following six sentences, fill in each blank with a suitable preposition or adverb. Let’s put our heads together and decide ____ a plan of action. His name sounds familiar ____ me. I must have ...
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