单项选择题
A.水准仪 B.经纬仪 C.拉准线 D.钢卷尺
A.吊线 B.垂准仪 C.经纬仪 D.托线板
A.30~50 B.40~60 C.50~70 D.60~80
A.砌完墙后用1:1水泥砂浆或加色砂浆勾缝 B.砌完墙后用1:1.5水泥砂浆或加色砂浆勾缝 C.砌完墙后用1:2水泥砂浆或加色砂浆勾缝 D.砌完墙后用1:2.5水泥砂浆或加色砂浆勾缝
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