—Look! All students in the classroom are preparing for the coming exams_____.
—Yes, the exams are very important to them.
A：enough careful
B：enough carefully
C：carefully enough
人们常用唐代诗人王勃《送杜少府之任蜀州》中的诗“____，____”，表达朋友虽然相距遥远却如在身边的感情
i是虚数单位，复数z满足（1+i）z=2，则z的实部为____．
下列变化一定属于化学变化的是（）
