皮皮学，免费搜题
登录
搜题
【单选题】
工化 3.1.5 波函数 ψ (原子轨道)是 ( )A.
描述电子在核外空间各处几率分布的数学表达式；
B.
描述电子在核外空间几率密度分布
C.
描述电子在核外运动状态的数学函数式；
D.
描述电子云分布的数学表达式
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】In a diesel engine, when refitting piston rings you should ①check the ring gap at the smallest diameter of the cylinder ②remove carbon from the ring groove
A.
①
B.
②
C.
①②
D.
neither ① nor ②
【单选题】In a diesel engine, when installing new piston rings it is important to check_______Iring gap clearance IIside clearance
A.
I only
B.
II only
C.
both I and II
D.
neither I nor II
【单选题】The scavenging air ports are located at such a height that they are just exposed by the _______of the piston when the piston is in the bottom dead center position.
A.
lower edge
B.
piston ring
C.
upper end
D.
skirt
【简答题】As the piston again reaches BDC, the exhaust valve opens, but the intake valve remains closed. The piston moves upwards on the exhaust stroke to force the burnt gases out of the cylinder through the e...
【简答题】When the piston move to its highest position inside the cylinder, we can say it is at Top Dead Center (TDC).(翻译)
相关题目：