根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项.
_____1____. The time and money that doctors spend on their medical education are probably one reason for this problem. A visit to a doctor’s office costs from fifteen to fifty dollars. It is impossible to pay for the medical care they need. _____2_____. Most doctors, however, disagree. They say that they were required to study medicine for a long time. Tuition（学费） for many years of medical education costs a lot of money. Doctors say that it is necessary for most medical students to borrow money from a bank to pay their tuition. _____3_____, young doctors need a lot of money for their work. _____4_____. Therefore it is possible that the high cost of medical care in American is unnecessary. Because high tuition is one cause of high costs, ____5_____.
It is possible for the poor people to see the doctor in America.
Many people in the United States think that doctors are overpaid
One way to lower costs would be to have medical schools that are free or have low tuition
They are not willing to pay high tuition for the doctors
The cost of medical care in the United States is very high
Because this money must be repaid to the bank
So, they charge people high prices for medical care
320的钢筋，构件承受轴力设计值N一800kN，已考虑二阶效应的弯矩设计值M=380kN·m，则截面受拉侧的配筋面积与下列（）项数值最为接近。