斜板除油是一种（）除油。
A.生物法
B.化学法
C.物理化学法
D.物理法
参考答案：D
—What are you busy with?
—The conference in our city next week. [ ]
A. held
B. will be held
C. being held
D. to be held
CJD最常见的临床类型是（）
A.散发型
B.医源型
C.获得型
D.遗传型
E.变异型
