可导函数的极值点必为函数的驻点.( )
A. 对
B. 错
"Feminism" is an informative speech topic of ______
A. Object
B. Event
C. Process
D. Concept
Which of the following strategies can help avoid abstractions in informative speechmaking?
A. Giving more details when giving an example
B. Using descriptions to communicate internal feelings
C. Using comparisons to state similarities
D. Using contrasts to state differences
Personal terms such as "you" and "we" can help the speaker better
A. communicate more information
B. relate the topic to the audience
C. get audience's attention
D. describe things clearly
微信支付 
支付宝支付