皮皮学，免费搜题
登录
搜题
【单选题】
11 夜盲症产生的原因是()A.
视紫红质缺乏
B.
维生素D 缺乏
C.
视黄醛过多
D.
11_顺型视黄醛过多
E.
视蛋白合成障碍
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
【多选题】保护接零适用于中性点接地的低压三相四线制系统中。保护接零在应用过程中,下列正确应用的有( )。
A.
接单相三极插座时,不允许将插座上接电源中性线的孔和接地线的孔串接,而是将电源中性线的孔和接地的孔用两根导线分别接地和接零
B.
接单相三极插座时,允许将插座上接电源中性线的孔和接地线的孔串接
C.
零线上不能装有熔丝和开关,防止零线回路断开后造成危险
D.
必须将零线重复接地
【单选题】What can we learn about the project from the news report?
A.
It occupies an area of 20,000 square kilometers.
B.
It is expected to take about three years ’ construction.
C.
It will serve as an education area for diplomats.
D.
It will be featured in American military history.
【单选题】Which is not true about the project proposed in Presidential Directive 54?
A.
The project is going to cost about $ 30 billion to build a new monitoring system.
B.
The project aims to share information between federal departments and private companies.
C.
The project will provide shield for networks of federal departments.
D.
The project is proposed to prevent hackers from stealing data from Pentagon.
【简答题】News about Project Hope has _________ a lot after the earthquake in various media.
【单选题】I would appreciate _____ if you could tell me the latest news about the project. [ ]
A.
you
B.
it
C.
that
D.
/
【单选题】Learning about Travel News and Sports News in China Daily his great interest ．
A.
． is
B.
． are
C.
． cause
D.
． gives
【多选题】下列评价与著作对应正确的是( )。
A.
乐而不淫，哀而不伤——《关雎》
B.
志深而笔长，梗概而多气——《左传》
C.
其文直，其事核，不虚美，不隐恶——《史记》
D.
一字之褒，荣于华衮;一字之贬，严于斧钺——《春秋》
相关题目：
参考解析：
知识点：
题目纠错 0
发布
