皮皮学，免费搜题
登录
搜题
【单选题】
纤毛细胞的换能机制是怎样的?()A.
基底膜的震动刺激纤毛细胞，发生偏斜，能够使纤毛外环境内淋巴细胞钾离子流入纤毛内，引起去极化，钙通道打开，进而又激发钙依赖加通道，钾离子流向外淋巴液引起复极化
B.
基底膜震动，纤毛发生偏转，纤毛外环境外淋巴液钾离子浓度低，通道打开钾离子流向外淋巴液
C.
基底膜震动，纤毛偏转，纤毛外环境是内淋巴液，通道打开，钾离子外流引起复极化
D.
基底膜震动使纤毛发生偏转，纤毛外环境内淋巴液钾离子浓度高，流入纤毛内，去极化是的钙离子通道打开，进而又使钙依赖钾通道打开，钾离子流向内淋巴液引起复极化
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】车站(助理)值班员接发旅客列车时,应在旅客站台一侧,无旅客站台和接发货物列车时,应在靠近列车线路的行车室一侧,能监视列车运行的( ),立岗迎送。
A.
规定地点
B.
安全地点
C.
《站细》规定地点
D.
指定地点
【单选题】Which of the following can contribute to business efficiency?
A.
Data processing must be a centralized service.
B.
The company develops and grows.
C.
The managers of different department know each other well.
D.
More machines should be used.
【单选题】矩形板，长、宽尺寸为6m×2.4m，板的跨度为2.4m，单向支承于6m跨度的梁上，若板的自重加使用荷载的设计值为12kN/m2，则梁上的线荷载为( )kN/m。
A.
14.4
B.
28.8
C.
36
D.
72
【单选题】In order to get paid, the beneficiary in documentary credit must present documents which conform. to the credit______.
A.
on the expiry date
B.
before the expiry date
C.
on or before the expiry date
D.
around the expiry date
【单选题】A poet must not write for the ages past, but for in which he lives and those which are to follow.
A.
one
B.
those
C.
the one
D.
that
【单选题】Regulations require that cargo tanks in which grades B or C liquids are carried must be vented with which of the following ________．
A.
Gooseneck vents
B.
Flame screens
C.
Pressure vacuum relief valves
D.
Forced draft blowers
【单选题】A poet must not write for the age past, but for______in which he lives and those which are to follow.
A.
one
B.
those
C.
the one
D.
that
【判断题】光缆的敷设安装应符合 YDJ44-89 « 电信网光纤数字传输系统工程施工及验收暂行技术规定 » 的要求 ,注明安装标准、技术措施、施工要求、防护要求及措施、特殊地段和地点技术保护措施、进局安装要求。
A.
正确
B.
错误
相关题目：
参考解析：
知识点：
题目纠错 0
发布
