微小病变性肾小球肾炎的病变特点是( )A．毛细血管内皮细胞增生 B．上皮下免疫复

在C#中，所有类都是直接或间接地继承System.Object类而得来的。

（）是巩固人民民主专政的根本保证

对称三相正弦量在任一时刻瞬时值的代数和都等于一个固定常数。（ ）

Soon, more of the information we receive via the Internet could come (155) in digital wrappers.
Wrappers are made up, (156) software code that’s targeted to do specific things with the data (157) within them, such as helping to define queries for search engines. They also keep (158) from (159) access to that code.

A．insiders

B．money

C．outsiders

D．warehouse

放线若需跨过带电导线时，应将带电导线停电后再施工；如停电困难时，可在跨越处搭跨越架子。