()是铁塔接地电阻测量的常用工具
A.地阻仪
B.水平仪
C.经纬仪
参考答案:A
下图画的新疆古老的引水工程是
A.引水渠
B.灌溉
C.坎儿井
D.水井
In most western countries, on April Fool’s Day, people often play __ ___ trick on each other; children especially have great ______ fun.
A.a; a
B.the; the
C./; a
D.a; /