当一个带电导体达到静电平衡时()
A. 表面上电荷密度较大处电势较高;
B. 导体内任一点与其表面上任一点电势差等于零
C. 导体内部的电势比导体表面的电势高
D. 表面曲率较大处电势较高
The blood ran down from the its heart and()the rose crimson red
A. stained
B. stains
C. staining
D. stain
Which of the following words require loss of plosion in pronuncation()
A. teabag
B. textbook
C. island
D. checkboard
Listen to the following passage and complete Statements 11-15. Then try to practice shadow reading sentence by sentence or phrase by phrase.When the first rose appeared on earth it was pure white.
A. ecastacy
B. ecstacies
C. ecstacied
D. ecstacying