皮皮学,免费搜题
登录
logo - 刷刷题
搜题
【单选题】
设降尘室的长、宽、高分别为L、b、H(单位均为m),颗粒的沉降速度为ut(m/s),气体的体积流量为Vs,则颗粒能在降尘室分离的条件是:
A.
H/ut≥LbH/Vs;
B.
H/ut≤LbH/Vs;
C.
L/ut≤LbH/Vs;
D.
L/ut≥LbH/Vs
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】____ is a phenomenon that in some speech communities two languages exist side by side with each having a different role to play; and language switching occurs when the situation changes.
A.
Bilingualism
B.
Diglossia
C.
Pidgin
D.
Creole
【单选题】Trust is a phenomenon that_.
A.
results from our experiences with others
B.
comes from our perceptions
C.
originates from the pit of the stomach
D.
does not have the power and intent to hurt others
【简答题】_ ____________________( 总的看来 ), the warming of the earth is a phenomenon that causes great concern.
【单选题】在骨骼肌细胞兴奋 - 收缩耦联过程中,胞质内的 Ca 2+ 来自( )
A.
横管膜上电压门控 Ca 2+ 通道开放引起的胞外 Ca 2+ 内流
B.
细胞膜上 NMDA 受体通道开放引起的胞外 Ca 2+ 内流
C.
肌质网上的 Ca 2+ 释放通道开放引起的胞内 Ca 2+ 释放
D.
肌质网上的 Ca 2+ 泵的反向转运
E.
线粒体内 Ca 2+ 的释放
【判断题】Maori Renaissance is a phenomenon that the Maori tradition and culture were better preserved, and the welfare and social status of the Maoris were imprved in New Zealand.
A.
正确
B.
错误
【单选题】Which of the following is a phenomenon that refers to situations in which people feel themselves at risk of being judged by others holding negative images about them?
A.
perceptual set
B.
the stereotype threat
C.
the glass cliff
D.
role approach
【单选题】“人生的道路虽然漫长,但关键的时候往往只有几步,特别是在年轻的时候”是谁提出的
A.
郭沫若
B.
鲁迅
C.
马云
D.
艾青
【单选题】4变频器调参时的下降时间是指( )。
A.
电机空载运行时间
B.
电机停止运行所用时间
C.
电机启动所用时间
D.
电机总运行时间
【单选题】在骨骼肌细胞兴奋-收缩耦联过程中,胞质内的Ca2+来自()
A.
横管膜上电压门控Ca2+通道开放引起的胞外Ca2+内流
B.
细胞膜上NMDA受体通道开放引起的胞外Ca2+内流
C.
肌质网上的Ca2+释放通道开放引起的胞内Ca2+释放
D.
肌质网上的Ca2+泵的反向转运
【简答题】is a phenomenon that air temperature may increase with altitude.
相关题目:
参考解析:
知识点:
题目纠错 0
发布
创建自己的小题库 - 刷刷题