A:a→c→d→b
B:c→d→a→b
C:a→b→c→d
D:a→d→b→c
热机包括内燃机,柴油机和汽油机都属于内燃机,关于热机的下列说法中正确的是( )
---Does Scott come _________ Beijing?
---Yes, but now he lives _________ his uncle in Shanghai.
B: Three.