备用的各种液压软管及管接头等用堵头堵塞，更换时要清洗干净。
参考答案：错
Harry Potter is an____book for children, but my cousin doesn’t seem at all_____in it.
A．interesting; interesting
B．interested; interested
C．interesting; interested
D．interested; interesting
该图中正确表示地球自转方向的是（）
A.①③
B.②③
C.②④
D.①④
