二类防雷建筑物利用建筑物的钢筋作为防雷装置时，单根钢筋或圆钢或外引预埋连接板、线与上述钢筋的连接应（）

A.焊接、螺栓紧固的卡央器连接

B.焊接、绑扎法连接

C.螺栓紧固的卡夹器连接、绑扎法连接

D.绑扎法连、压接

In spite of the wide range of reading material specially written or ______ for language learning purposes, there is yet no comprehensive systematic program for the reading skills.

A. adapted
B. acknowledged
C. assembled
D. appointed