皮皮学,免费搜题
登录
搜题
【单选题】
为完满生活做准备的教育目的是( )提出的。
A.
卢梭
B.
斯宾塞
C.
杜威
D.
赫尔巴特
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】夜间看手机,眼干涩酸痛,睁眼困难的原因是
A.
外直肌运动过度
B.
瞳孔括约肌收缩过度,泪膜蒸发
C.
房水在视疲劳时分泌过快,睫状突疲劳
D.
晶状体收缩,房水分泌量减少
E.
睫状肌运动过度,房水分泌量减少
【单选题】设 A 、 B 集合 , 若 A={ Ф } , B={ Ф , { Ф }} , 则正确的是
A.
A B 且 A B
B.
A B 且 A B
C.
A B 且 A B
D.
A B 且 A B
【单选题】设U是所有属性的集合,X、Y、Z都是U的子集,且Z=U—X—Y。下面关于多值依赖的叙述中,_______是不正确的。
A.
若X→→Y,则X→→Z
B.
若X→Y,则X→→Y
C.
若X→→Y,且Y’∈Y,则X→→Y’
D.
若Z=Ф, 则X→→Y
【单选题】The General Rule of Multiplication is used to compute:
A.
subjective probabilities.
B.
the probability of two or more mutually exclusive events.
C.
the probability of two or more dependent events.
D.
the probability of two or more independent events.
【单选题】The General Rule of Multiplication is used to compute:
A.
the probability of two or more dependent events.
B.
the probability of two or more independent events.
C.
the probability of two or more mutually exclusive events.
D.
subjective probabilities.
【单选题】The General Rule of Addition is used to compute:
A.
subjective probabilities.
B.
the probability of two or more independent events.
C.
the probability of two or more collectively exhaustive events.
D.
the probability of two events, which are not mutually exclusive.
【单选题】清洁生产行业标准分 几 级?
A.
1
B.
2
C.
3
D.
4
【单选题】设U是所有属性的集合,X、Y、z都是U的子集,且=U-X-Y。下列关于多值依赖的叙述中,哪一条是不正确的?
A.
若X→→Y则X→→Z
B.
若X→Y,则X→→Y
C.
若X→→Y,且Y' Y,则X→→Y'
D.
若Z=Ф,则X→→Y
【单选题】心电图各波段意义,错误的是:
A.
P波代表两心房除极化过程
B.
P-R段代表两心房复极过程
C.
QRS波群代表两心室除极化过程
D.
T波代表两心室复极化过程
【简答题】何谓心电图?正常心电图由哪些波段组成?其各波段代表的意义是什么
相关题目: