A.两条磁感线不可以相交
B.磁感线是磁场中实际存在的线
C.磁感线总是从N极出发,到S极终止
D.磁感线可以相切
答案:A
小题1:These are pencils.(改为单数句)
________ ________ ________ ________.
小题2:He plays sports every day.(改为一般疑问句)
________ ________ ________ sports every day?
小题3:The card is in the drawer.The book is in the drawer.(合并为一个句子)
The card ________ the book ________ in the drawer.
小题4:Are they your father and mother? (改为同义句)
Are they your ________?
小题5:She has a white tennis racket.(对划线部分提问)
________ ________ she ________?
具有健脾渗湿、消痈排脓功效的药物是()
A.薏苡仁
B.车前子
C.木通
D.茯苓
E.滑石