通过现场（），可以检查管道的设计标高尺寸是否与实际相符。
A．实测
B．观察
C．察看
D．目测
参考答案：A
呼吸系统由______和______组成；其中______ 能使吸入的气体变得温暖、湿润、清洁．
用括号内所给单词的适当形式填空。
1. When I arrived at the park, I saw those children ______(play) football on the grass.
2. The headmaster asked us _____(not be) late for school.
3. Can you tell me how _____(get) to the Children Palace?
4. He will call you back as soon as he _____(come) back.
5. The Green family live in the ____(center) part of the village.
ball on the grass. 
the
village.