搜题请搜索小程序“爱下问搜题”
问题 单项选择题

温度升高导致三极管参数发生（）变化。

A、Icbo、β、Ube都增大

B、Icbo、β、Ube都减小

C、Icbo和β增大、Ube减小

D、Icbo减小、β和Ube增大

答案

参考答案：C

选择题

看图，选择相应的介词填在题前括号里。

1. There are many flowers _____________ the river. [ ]

A. in

B. near

C. on

2. The ducks are _____________ the water. [ ]

A. in

B. on

C. under

3. The bridge is _____________ the river. [ ]

A. behind

B. on

C. over

4. The girl is _____________ the tree. [ ]

A. on

B. under

C. near

5. The houses are _____________ the trees. [ ]

A. behind

B. in front of

C. over
查看答案
名词解释

先付年金
查看答案