电阻串联的主要应用是串联分压，其分压规律为( )。A、 大电阻分低电压 B、 小电阻分高电压C、
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当参考点改变时，电路中的电压是（ ）。
A. 变大
B. 变小
C. 不变
D. 不确定
( ) What goals can a ballet performance reach?
A. It may tell a story.
B. It can express a mood.
C. It can reflect the music.
D. All of the above.
( ) What is special about the women dancers' shoes?
A. The shoes are colorful and expensive so that they can attract attention.
B. The tips of their shoes are sharp so it can hurt people.
C. The tips of their shoes are made with layers of cloth and glue.
D. The heels of the shoes are usually very high so the dancers can be tall.
( ) How can the ballet dancers express emotions like anger, fear, jealousy, joy or sadness?
A. By using their bodies.
By using the music.
C. By using the face expressions.
D. By telling a story.
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