车轮防抱死制动系统电子控制系统一般由（）、ECU、执行器、警告灯组成。
A.传感器
B.调节器
C.节温器
D.制动鼓
参考答案：A
At first, I was not too sure if he could answer the question. However, ____,he worked it out at last with the help of his friend.[ ]
A. to my anger
B. to my surprise
C. in other words
D. in a word
影响旅行社设立的内部因素包括（）
A.资金
B.营业场所
C.营业设施
D.经营管理能力
