_______ plays an important part in winning the fight against the serious disease?
A:Who do you think
B:Whom do you think
C:Do you think whom
D:Do you think who
小周在日记里写道:“放学时,铃声是悦耳的;考试时,铃声是紧张的;思考时,铃声是刺耳的。”这说明( )
计算:25×15+25x110-25x12.
①心脏 ____ a、上皮组织
②汗腺 ____ b、肌肉组织
③脑颅骨 ____ c、神经组织
④大脑 ____ d、结缔组织