The frequent ______ from cold to warm weather this spring have caused much illness.A．trans

According to the passage, "attachment parenting"______.A．includes frequent physical contac

The coffee is very cold. It needs______.A．hotB．to be heatingC．to be heatedD．to be hotted

The rate of heat transfer from a hot region to a cold region is affected most by the _____

There is frequently a great interval between knowing how to solve a problem and______the r

The Prime Minister frequently wandered from his text to ______ on a point that had obvious

The body needs fat to keep it ___________ the cold during the long winter months.[A] b