皮皮学,免费搜题
登录
搜题
【简答题】
从变量的作用域角度分有全局变量和__________变量。
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
【简答题】Seat belts are also called ________.
【简答题】We welcome you aboard the Eastern Flight and will do our best to make your trip comfortable and enjoyable. For your safety and convenience To begin the trip, we would like to draw your attention to so...
【简答题】We welcome you aboard the Eastern Flight and will do our best to make your trip comfortable and enjoyable. For your safety and convenience To begin the trip, we would like to draw your attention to so...
【单选题】下列具有明显层理构造的第四纪沉积物是:( )
A.
残积土
B.
坡积土
C.
冲积土
【单选题】Advocates of seat belts on school buses―many of them are parents and medical organisations―argue that seat belts are necessary not only to reduce fatality and injury, but also to teach children lesson...
A.
The use of seat belts can stop the death and injury .
B.
Seat belts can help children realize the importance of using them in moving vehicles.
C.
Seat belts can teach children lessons about the importance of keeping away from drivers.
【单选题】下列具有明显的层理构造的土层是( )
A.
冲积土
B.
洪积土
C.
残积土
D.
坡积土
【多选题】当前猪饲喂采用的方法有哪些( )?
A.
干料饲喂法
B.
湿拌料
C.
稀粥料
D.
精粗料
E.
性欲强
【多选题】二极管的基本原理 说法正确的是
A.
当 PN 结外加正向电压(正向偏置)时,在外电路上则形成自 P 区流入而从 N 区流出的电流,称为正向电流 IF ,这就是 PN 结的正向导通状态。
B.
当 PN 结外加反向电压时(反向偏置)时,反向偏置的 PN 结表现为高阻态,几乎没有电流流过,被称为反向截止状态。
C.
二极管只要击穿,必然会被烧毁。
D.
PN 结具有一定的反向耐压能力,但当施加的反向电压过大,反向电流将会急剧增大,破坏 PN 结反向偏置为截止的工作状态,这就叫反向击穿。
【简答题】Task 3 We welcome you aboard the Eastern Flight and will do our best to make your trip comfortable and enjoyable. For your safety and convenience To begin the trip, we would like to draw your attentio...
【判断题】当处于正向导通状态的电力二极管的外加电压突然从正向变为反向时,该电力二极管并不能立即关断,而是在关断之前有较大的反向电流出现,并伴随有明显的反向电压过冲,须经过一段短暂的时间才能重新获得反向阻断能力,进入截止状态,这就是关断过程。
A.
正确
B.
错误
相关题目: