土地勘测定界外业测量工作中，界址点放样的中误差应控制在（）允

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问题单项选择题

土地勘测定界外业测量工作中，界址点放样的中误差应控制在（）允许误差为（）

A.+10cm；+20cm

B.+20cm；+30cm

C.+20cm；+40cm

D.+10cm，+40cm

答案

参考答案：A

解析：土地勘测定界外业测量工作中，取得了界址点放样的数据元素后，在野外进行实地放样界址点。界址点放样的中误差应控制在±10cm，允许误差为±20cm。

补全对话，情景问答

根据下面对话内容及所给的首字母提示，在对话后的横线上写出对话中所缺的单词。单词必须写完整。

Zhou Lan (Z) and Bruce (B) are talking about learning English.

B: What do you find hardest in learning English?

Z: I find listening really hard. Sometimes it" s difficult to u 1 : It" s not easy to catch its meaning.

B: Well, you need 1 2 of practice. The more you listen, the e 3 it becomes. .

Z: But I don' t find the best w 4 to do that. Would you please lend me a h 5 ?

B: W 6 not get a radio? It's helpful to listen to English p 7 on the radio.

Z: It s 8 like a good idea.

B: Practise m 9 , and you'll find l 10 is not so hard.

Z: I'll try my best to do that. Thank you.

1. 2. 3. 4. 5.

6. 7. 8. 9. 10.

选择题

The teacher divided the students in his class _____ ten teams. [ ]

A. in

B. to

C. into

D. at