皮皮学，免费搜题
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【单选题】
在线性相关中，若两个变量的变动方向相反，一个变量的数值增加，另一个变量的数值随之减少，或一个变量的数值减少，另一个变量的数值随之增加，则称为( )。A.
正相关
B.
负相关
C.
完全相关
D.
非线性相关
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
【多选题】The Ricardian model demonstrates that A) trade between two countries will benefit both countries. B) trade between two countries may benefit both regardless of which good each exports. C) trade betwee...
A.
trade between two countries will benefit both countries.
B.
trade between two countries may benefit both regardless of which good each exports.
C.
trade between two countries may benefit both if each exports the product in which it has a comparative advantage.
D.
D) trade between two countries may benefit one but harm the other.
E.
trade between two countries always benefits the country with a larger labor force.
【多选题】针式打印机字车机构是一个比较复杂的装置，由多个部件组成，字车机构主要包括字车、导轨、还包括( )等。
A.
字车驱动电机;
B.
传动齿形皮带;
C.
压纸杆;
D.
出纸辊;
E.
齿带轮
【多选题】家庭美德的内容主要包括()等。家庭美德不仅对家庭关系发挥着积极的能动作用，也是社会和谐的基础。
A.
尊老爱幼
B.
男女平等
C.
夫妻和睦
D.
勤俭持家
E.
邻里团结
【简答题】A．Men should remember whatever women say. B．Men should give women whatever they want. C．Women give it when men fail to catch what they say. D．Women appreciate it when men make an effort to understand ...
【单选题】Interest rates between two countries tend to converge if:
A.
both countries have a financial account surplus.
B.
both countries have a current account surplus.
C.
the residents of the two countries believe that a foreign asset is as good as a domestic one.
D.
the residents of the two countries prefer domestic assets to foreign assets.
【简答题】Which two countries will he visit?
【简答题】客房小酒吧一般采取配备、 、 三步式管理。
【单选题】在磁罗经罗经柜内左右两边水平纵向放置的磁棒为________校正器,用于校正罗经的________。07
A.
硬铁，半圆自差力
B.
硬铁，象限自差力
C.
软铁，半圆自差力
D.
软铁，象限自差力
【单选题】下列关于幼儿园书籍,教具,玩具,桌椅的卫生要求表述中,正确的是
A.
为了培养幼儿勤俭节约的习惯，已脏破的书籍鼓励继续使用
B.
铅笔笔芯不宜太软，否则字迹太浅，易导致眼疲劳
C.
玩具的大小，轻重应适合幼儿使用
D.
合适的桌椅应与小腿高相适应，适宜的椅深应是大腿的后4分之3置于椅面上
相关题目：
【多选题】针式打印机字车机构是一个比较复杂的装置，由多个部件组成，字车机构主要包括字车、导轨、还包括( )等。
A.
字车驱动电机;
B.
传动齿形皮带;
C.
压纸杆;
D.
出纸辊;
E.
齿带轮