总线缓冲器上的跳键用于设定总线缓冲器的（）
A、时钟和时间传输的状态
B、容量
C、时间传输的状态
D、时钟频率
参考答案：A
选择正确的单词，完成对话。
A
Joy: Mum, I want a l. dress. My old dress is to0 2. . I want a big one.
Mum: OK. Let's go to buy a dress at two o'clock.
B
Jane: I'll draw a picture for Dad's birthday. But I can't draw very well. It's 3. for me. Can you
help me, Sam? You can draw well. It's 4. for you.
Sam: OK.
按照生产能力指数法(X=0.8，f=1.1)，如将设计中的化工生产系统的生产能力提高到三倍，投资额将增加( )。
A．118.9% B．158.3%C．164.9% D．191.5%
