A:大小有关
B:作用点有关
C:方向有关
D:大小、方向、作用点都有关
有关特异性免疫的叙述正确的是( )
— do you go to school each day? —I go to school by bike.
If it _______ for his invitation the other day, I should not be here now.
把下列句子改成把字句
①陈医生看好了孩子的病。 ②我被这动人的情景吸引住了。