烹饪是对食物原料的加工制熟活动，其中蕴涵了大量的知识体系，这是指烹饪的（）特点。
A.技术性
B.科学性
C.文化性
D.艺术性
参考答案：B
Which of the following statements is true of the Parkinson’s disease a. Parkinson’s always shows the same symptoms on different people. b. People inflicted with Parkinson’s often have a shaking hand or a stiff hand. c. The symptoms of Parkinson’s vary among different patients. d. Victims of Parkinson’s find it difficult to recall what they have eaten for dinner.
桥梁设计采用的作用可分为永久作用、可变作用和偶然作用三类，以下哪一项属于永久作用？（）
A、汽车荷载
B、地震作用
C、汽车装机作用
D、汽车制动力
