Oral problems in children can develop into more severe problems.A．RightB．WrongC．Not mentio

Dental and oral diseases are common in both adults and children.A．RightB．WrongC．Not mentio

Oral problems can not be avoided in any way.A．RightB．WrongC．Not mentioned

It can be seen from the passage that the problem of resource conservation in agriculture _

Which of the following problems can cause fluctuating pressures in the closed cooling syst

What else can we learn about the current population problem in Australia from the passage？

Facing childrens problems in adjusting to college, some parents seem to______.A．be very he