皮皮学,免费搜题
登录
搜题
【单选题】
在粉尘、烟尘和气体逸散到劳动者呼吸带(),就在产生的源头将其除去,这是避免劳动者吸入粉尘、烟尘和气体的最有效方法。
A.
时
B.
前
C.
后
D.
下方
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案:
举一反三
【单选题】—______ are they visiting their friends? —Next Saturday. [ ]
A.
Who
B.
What
C.
Why
D.
When
查看完整题目与答案
【单选题】The teacher, with 6 girls and 8 boys of her class, ________visiting a museum when the earthquake struck. [ ]
A.
was
B.
were
C.
had been
D.
would be
查看完整题目与答案
【判断题】临终关怀就是安乐死。( )
A.
正确
B.
错误
查看完整题目与答案
【单选题】The teacher, with 6 girls and 8 boys of her class, ______ visiting a museum when the earthquake struck.
A.
would be
B.
were
C.
had been
D.
was
查看完整题目与答案
【简答题】When visiting the US in 1830s, Alexis de Tocqueville found that the nature of the country was______.
查看完整题目与答案
【单选题】知二次函数 的图象如图所示,则下列结论:(1)4a+2b+c>0;(2)方程 两根之和小于零; (3)y随x的增大而增大; (4)一次函数 的图象一定不过第二象限,其中正确的个数是 [ ]
A.
4个
B.
3个
C.
2个
D.
1个
查看完整题目与答案
【简答题】The teacher, with 6 girls and 8 boys of her class, ______ visiting a museum when the earthquake struck. A) was B) were C) had been D) would be
查看完整题目与答案
【单选题】已知二次函数 y = ax 2 -2 ax -3 a ( a ≠0),关于此函数的图象及性质,下列结论中不一定成立的是( )
A.
该图象的顶点坐标为(1,﹣4 a )
B.
该图象与 x 轴的交点为(﹣1,0),(3,0)
C.
若该图象经过点(﹣2,5),则一定经过点(4,5)
D.
当 x >1时, y 随 x 的增大而增大
查看完整题目与答案
【单选题】已知二次函数y=ax 2 +bx+c(a≠0) 的图象如图所示,则下列结论:(1)4a+2b+c>0; (2)方程ax 2 +bx+c=0两根之和小于零;(3)y随x的增大而增大;(4)一次函数y=x+bc的图象一定不过第二象限。其中正确的个数是 [ ]
A.
4个
B.
3个
C.
2个
D.
1个
查看完整题目与答案
【单选题】Compared with visiting a social networking site, when dealing with health tracking,______.
A.
you can act as a totally different person
B.
you can create a new personal data for yourself
C.
you can keep your personal data under control
D.
you can release your personal data unconsciously
查看完整题目与答案
相关题目:
【单选题】—______ are they visiting their friends? —Next Saturday. [ ]
A.
Who
B.
What
C.
Why
D.
When
查看完整题目与答案
【单选题】The teacher, with 6 girls and 8 boys of her class, ________visiting a museum when the earthquake struck. [ ]
A.
was
B.
were
C.
had been
D.
would be
查看完整题目与答案
【判断题】临终关怀就是安乐死。( )
A.
正确
B.
错误
查看完整题目与答案
【单选题】The teacher, with 6 girls and 8 boys of her class, ______ visiting a museum when the earthquake struck.
A.
would be
B.
were
C.
had been
D.
was
查看完整题目与答案
【简答题】When visiting the US in 1830s, Alexis de Tocqueville found that the nature of the country was______.
查看完整题目与答案
【单选题】知二次函数 的图象如图所示,则下列结论:(1)4a+2b+c>0;(2)方程 两根之和小于零; (3)y随x的增大而增大; (4)一次函数 的图象一定不过第二象限,其中正确的个数是 [ ]
A.
4个
B.
3个
C.
2个
D.
1个
查看完整题目与答案
【简答题】The teacher, with 6 girls and 8 boys of her class, ______ visiting a museum when the earthquake struck. A) was B) were C) had been D) would be
查看完整题目与答案
【单选题】已知二次函数 y = ax 2 -2 ax -3 a ( a ≠0),关于此函数的图象及性质,下列结论中不一定成立的是( )
A.
该图象的顶点坐标为(1,﹣4 a )
B.
该图象与 x 轴的交点为(﹣1,0),(3,0)
C.
若该图象经过点(﹣2,5),则一定经过点(4,5)
D.
当 x >1时, y 随 x 的增大而增大
查看完整题目与答案
【单选题】已知二次函数y=ax 2 +bx+c(a≠0) 的图象如图所示,则下列结论:(1)4a+2b+c>0; (2)方程ax 2 +bx+c=0两根之和小于零;(3)y随x的增大而增大;(4)一次函数y=x+bc的图象一定不过第二象限。其中正确的个数是 [ ]
A.
4个
B.
3个
C.
2个
D.
1个
查看完整题目与答案
【单选题】Compared with visiting a social networking site, when dealing with health tracking,______.
A.
you can act as a totally different person
B.
you can create a new personal data for yourself
C.
you can keep your personal data under control
D.
you can release your personal data unconsciously
查看完整题目与答案
参考解析:
知识点:
题目纠错 0
发布