三端钮接地电阻测量仪测量接地电阻的接线图。
参考答案：
测量接地电阻的接线图如图所示。
All schools in our province _____ new English textbooks to improve students' listening, speaking, reading and
writing abilities three years ago. [ ]
A. admired
B. admitted
C. adopted
D. afforded
《祖国颂》是（）作词、（）作曲的四部合唱曲。
