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问题
单项选择题
平面控制测量中平面控制网的基本精度,应使四等以下的各级平面控制网的最弱边长中误差( )mm。
A.不大于0.01
B.不大于0.1
C.不大于0.02
D.不大于0.2
答案
参考答案:B
填空题
在△ABC中,AB=2,AC=1,∠ABC=
π
6
,则∠BAC=______.
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补全对话,情景问答
根据A栏的问题,选择B栏的答语,将其标号填入题前括号内。
A
( ) 1. Could you take a message?
( ) 2. Who's that?
( ) 3. When and where shall we meet?
( ) 4. Which is your mother?
( ) 5. Can I help you?
B
a. Yes, I want a T-shirt.
b. At 8:00 at the school gate.
c. With pleasure.
d. This is Mary speaking.
e. The woman in red.
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