每组循环水泵在机旁开启后应注意将转换开关置()位,以便使机组保持连锁运行状态。
参考答案:集中
情景对话。
A: Excuse me! May I ask you some questions?
B: 1______
A: What do you usually do on Sunday mornings?
B: 2______
A: Football? Are you good at football?
B: 3______ I like it very much.
A: Well, what do you often do on Sunday afternoons?
B: 4______
A: Homework? Are you good at English or maths?
B: Maths. But I also like learning English.
A: Why?
B: 5______
A: What about Sunday evenings?
B: I often watch TV.
A: Thank you.
日经股价指数分为()。
Ⅰ.日经225种股价指数
Ⅱ.日经500种股价指数
Ⅲ.日经180种股价指数
Ⅳ.日经300种股价指数
A.Ⅲ、Ⅳ
B.Ⅰ、Ⅱ、Ⅲ
C.Ⅰ、Ⅱ
D.Ⅰ、Ⅲ、Ⅳ