痔在齿线以上称为________，在齿线以上称为________。
参考答案：内痔 外痔
最易导致疼痛的外邪是（）。
A.风
B.寒
C.暑
D.燥
E.湿
While the total number of farmers engaged in agricultural production is barely half () it used to be in 1959, the size of the average farm has tripled.
A. that
B. what
C. which
D. how
