胺碘酮引起的最严重的不良反应为（）。
A.肺纤维化
B.转氨酶升高
C.光过敏
D.角膜色素沉着
E.甲状腺功能亢进或减退
参考答案：A
" _____ you like to go for a walk?" "Yes, _____ ."[ ]
A. Would, I like to
B. Do, I like
C. Do, I'd like to
D. Would, I'd like to
设三阶常系数线性齐次微分方程具有特解y1=ex，y2=2xex，y3=3e-x，则该方程为______．
