【简答题】若一带电导体表面上某点电荷面密度为 σ ,则该点外侧附近场强为 σ / ε 0 ,如果将另一带电体移近,该点场强是否改变()?公式 Ε = σ / ε 0 是否仍成立()?
【单选题】Do you often do some _____ at home? [ ]
【判断题】baby-sitting service
【简答题】多址协议主要分为3类:()多址接入、()多址接入和()的多址接入。
【单选题】As an American, what did he think of his African background?
A.
The commentator is very disappointed of his African background.
B.
The commentator is very annoyed of his African background.
C.
The commentator is very proud of his African background.
D.
The commentator is very sad of his African background.
【简答题】What did he think of those kids who could speak a foreign language?
【简答题】简述哲学基本问题的内容及其理论意义。 答:(1)哲学基本问题是思维和存在或意识和物质的关系问题。 (2)哲学基本问题包括两方面的内容:第一,思维和存在或意识和物质何者是第一性的问题。第二,思维和存在有无同一性,即意识能否认识现实世界的问题。 (3)哲学基本问题具有重要的理论意义:对其第一方面的不同回答,是划分唯物主义和唯心主义的唯一标准。对其第二方面的不同回