皮皮学，免费搜题
登录
搜题
【多选题】
织物的三要素是( )A.
纱线系统
B.
密度
C.
组织结构
D.
长度
E.
纱线细度
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】下列有关命题的说法正确的是 [ ]
A.
命题“若x 2 =1，则x=1”的否命题为：“若x 2 =1，则x≠1”
B.
命题“若x=y，则sinx=siny”的逆否命题为真命题
C.
命题“存在x∈R，使得x 2 +x+1<0”的否定是：“对任意x∈R，均有x 2 +x+1<0 ”
D.
“x= ―1”是“x 2 ―5x―6=0
【单选题】Which of the following is NOT MENTIONED in the third paragraph?
A.
Group work gives pupils the opportunity to learn to work together with others.
B.
Pupils also learn to develop their reasoning abilities
C.
Group work provides pupils with the opportunity to learn to be capable organizers.
D.
Pupils also learn how to participate in teaching activities.
【单选题】关于血栓形成,错误的是:
A.
静脉血栓多于动脉血栓
B.
下肢血栓多于上肢血栓
C.
静脉内血栓常为红色血栓
D.
动脉内血栓可为红色血栓
E.
毛细血管内血栓多为透明血栓
【单选题】Which of the following is NOT mentioned in the third paragraph?
A.
Group work gives pupils the opportunity to learn to work together with others.
B.
Pupils also learn to develop their reasoning abilities.
C.
Group work provides pupils with the opportunity to learn to be capable organizers.
D.
Pupils also learn how to participate in teaching activities.
【单选题】下列有关命题的说法正确的是 [ ]
A.
命题“若x 2 =1，则x=1”的否命题为：“若x 2 =1，则x≠1”
B.
命题“若x=y，则sinx=siny”的逆否命题为真命题
C.
命题“存在x∈R，使得x 2 +x+1<0”的否定是：“对任意x∈R，均有x 2 +x+1<0 ”
D.
“x=-1”是“x 2 -5x-6=0”的必要不充分条件
相关题目：
参考解析：
知识点：
题目纠错 0
发布
