在水平子系统的设计中。一般要遵循以下哪些原则？（）。
A.性价比最高原则
B.预埋管原则
C.水平缆线最短原则
D.使用光缆原则
参考答案：A, B, C
从Ⅱ栏中找出与Ⅰ栏相对应的答语。
Ⅰ
1. When is your birthday?
2. How much is the blue T-shirt?
3. What's the time?
4. What does he do?
5. Why do you like monkeys?
Ⅱ
A. It's ten o'clock.
B. He's a teacher.
C. My birtbdayis September 1st.
D. Because they are cute.
E. It' s ten dollars.
1. ______2 ．______ 3. ______ 4 ．______ 5 ．______
跨越不停电线路时，施工人员严禁从（）架上通过。
A、封顶
B、防护
C、跨越
