A bilingual speaker often uses two languages alternatively during a conversation with another bilingual speaker, a speech situation known as________.
A: discourse role-switching
B: activity role-switching
C: social role-switching
D: code-switching
A: discourse role-switching
B: activity role-switching
C: social role-switching
D: code-switching
举一反三
- 类别转换(class switching)]
- 报文交换（message switching）无需进行报文拆分与重组，因此比分组交换（packet switching）效率高。
- When a bilingual speaker switches between the two languages concerned, he is converting one mode of thinking into the other. （ ）
- During each switching cycle, the energy dissipation has no dependence on the resistance of the device. A: ) True B: ) False
- Which of the following is not the role of high-voltage circuit breaker ? ( ) A: Switch on and off various load circuits under normal conditions B: Automatically and quickly switch off the fault current under fault conditions C: Realize the function of automatic reclosing D: Switching voltage level