I was reading a novel_____ he was watchingTV.
A.when
B.while
C.before
D.as
答案:B
痫病的病因不包括()
A.先天遗传
B.劳欲过度
C.脑部外伤
D.饮食失调
E.七情失调
《砌体规范》6.1.2条第3款对圈梁的规定,如何理解?