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【单选题】
在墩基础的中心及纵横轴线已经测设完成的情况下,可以纵横轴线为坐标轴,根据设计提供的桩与墩中心的相对位置,用坐标法或支距法放出各桩的中心位置,其限差为±()cm
A.
1
B.
2
C.
3
D.
4
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【简答题】下述情况中哪些是遗传重组中的相互交换例子?原噬菌体整合;原噬菌体切离;Hfr×F - 细菌杂交形成重组子;普遍性转导;由Hfr细菌形成F'因子;由F + 细胞形成Hfr细菌;细菌转化。
【简答题】Passage Two Questions 19 to 22 are based on the passage you have just heard. 19. A. Taking up exercises after recovery. B. Producing tasty healthy frozen food. C. Finding new ways to cure heart diseas...
【判断题】教师应尽量培养幽默的意识。
A.
正确
B.
错误
【单选题】入噬菌体侵入大肠杆菌细胞后通过( )而进入溶源状态。
A.
同源重组
B.
位点特异性重组
C.
转座作用
D.
异常重组
【单选题】Which operation does not take place in the following example? int x = 21; double y = 6; double z = 14; y = x / z; x = 5.5 * y;
A.
implicit conversion
B.
promotio
C.
explicit conversion
D.
truncation
【简答题】外源DNA导入原核细胞可以采用______法,即重组质粒载体导入感受态细胞;______法,即重组噬菌体DNA或重组噬菌质粒导入感受态细胞;______法,即外源DNA被包装成九噬菌体颗粒导入宿主细胞。
【单选题】How do you handle the problem of “Whydidyouleaveyourlastjob?”in an interview?
A.
T he previous job was terrible.
B.
It is advised to answer from the point of view of your promotio n.
C.
Try to comment on the former company without any gratitude.
D.
It is advised to mention to choose a work with high salary.
【判断题】以噬菌体为媒介实现细菌染色体重组的过程是性导。
A.
正确
B.
错误
【单选题】In some cases, job swapping can make employees
A.
unsure about applying for promotio
B.
B dissatisfied with their present situatio
C.
C aware they might be unsuitable for a colleague's jo
【简答题】噬菌体参与的细菌基因的转移和重组方式有_________和_________。
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