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【多选题】
下列关于PCV 阀的相关叙述,正确的是( )。(II)A.
PCV 阀是排放控制的装置之一
B.
曲轴箱窜气的主要成分是CO
C.
开式强制曲轴箱通风系统中,若PCV 阀堵塞则窜气就不能够被吸入进气歧管,而是排放到大气当中
D.
若无异常情况,则无需定期检查PCV 阀
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皮皮学刷刷变学霸
举一反三
【单选题】The replacement of mature cell type with less mature cell type refers to:
A.
hyperplasia
B.
metaplasia
C.
dysplasia
D.
hypertrophy
【简答题】He has someone behind him.英译汉
【简答题】代表团昨天下午游览了市容,下午参观了一个工厂。完善我们董事长请代表团吃晚饭,他们特别喜欢吃北京烤鸭。
【单选题】A typical differentiated cell expresses only about ____ of the genes in its total repertoire. This selection, which differs from one cell type to the next, is the basis for the specialized properties ...
A.
1/4
B.
2/5
C.
1/2
D.
3/4
【判断题】Transdifferentiation is the conversion of a cell type present in one tissue or organ into a cell type from another tissue or organ without going through a pluripotent cell state. Transdifferentiation ...
A.
正确
B.
错误
【简答题】This TV channel has too many commercials.英译汉
【简答题】英译汉: The park has been reduced to half its former size.
【简答题】This place has plentiful material resources. 英译汉
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