制动系主要包括（）和制动驱动系统两部分。
参考答案：制动器
皮毛与哪一脏关系密切？（）
A.心
B.肺
C.脾
D.肝
—What did the teacher say just now?
—He asked me _____
A．Where I live in
B．Where I lived
C．Where do I live in
D．Where did I live
