皮皮学，免费搜题
登录
搜题
【多选题】
点亮一般的 LED所耗用的电流约为多少 ?A.
1-5uA
B.
5000-20000uA
C.
1-5mA
D.
5-20mA
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】听力原文：W: London is a gorgeous city. From here you can see the palace guards. M: Wait until we get to Paris and Madrid. And don't forget about Rome! Q: Where did the conversation take place? (13)
A.
In Rome.
B.
In Paris.
C.
In London.
D.
In Madrid.
【单选题】在共享式网络里面(简单来说,即以集线器作为互联设备的网络),网卡模式设为混乱模式时
A.
可以获取本网段所有数据包
B.
只能获取源地址或者目的地址为本机的数据包、广播包、与自己有关的组播报
C.
只能获取源地址或者目的地址为本机的数据包、广播包
D.
只能获取广播包、与自己有关的组播报
【简答题】完形填空。 The most difficult thing for university student Shaun Rogers is opening the classro om door by himself. Shaun can’t do this without __ 1 __because he is only six years old. He’s the _ _2 __ pers...
【单选题】听力原文： Gay women working in the City of London's financial services sector are three times more likely than male counterparts to keep quiet about their sexuality, according to a survey published on Tue...
A.
They are trying their best to fight for gender equality in their work.
B.
They are less vocative of their sexual orientation than men.
C.
Their working environment gives little tolerance to homosexual people.
D.
Most of their colleges are heterosexual white males.
【简答题】所谓显著性检验是为了判断测定结果或分析方法之间是否存在 。其中 t 检验法用来评价分析方法的 (填准确度或精密度) ;而 F 检验法则用来检查测定值的 (填准确度或精密度) 有无显著性的差异。在对某一试样的两组分析数据的平均值进行比较时,须先进行 检验,再酌情进行 检验。如经检验表明不存在显著性差异,则说明这些差异是由 误差引起的。
【单选题】听力原文：M：You have been in London for several months．How do you like the city? W：The only thing is the sun never smiles. It's always grey and unhappy． Q：What doesn't the woman seem to like about London? ...
A.
The unsmiling faces.
B.
The sun.
C.
The residents.
D.
The weather.
【简答题】先阅读短文，在其后空白处写出各单词的正确形式，单词的第一个字母已给出。 One day, I was walking along Fifth Avenue. Suddenly I remembered that I n 1 to buy a pair of socks. I turned into the first sock shop that c 2 my eye, and a boy c...
相关题目：