原发性慢性间质性肾炎的病因是（）
A.放射线
B.重金属
C.含马兜铃酸药物
D.镇痛药、环孢素
E.巴尔干肾病
参考答案：A, B, C, D, E
What was one result of the increased use of machinery on farms of the United States
A．Prices for farm produce rose.
B．Farmers became more dependent on loans from banks.
C．Jefferson established government programs to assist farmers.
D．Farmers relied less on foreign markets.
“欲诣扶桑，无舟莫适”句中的“适”
A．前往B．适合C．正好D．刚才E．舒适
