17一18世纪,创作意大利正歌剧的作曲家有()。
A.蒙泰威尔第
B.罗西尼
C.亚历山大•斯卡拉第
D.巴赫、威尔第
E.亨德尔
F.维瓦尔第、哈塞
参考答案:A, C, E, F
用括号内所给单词的适当形式填空。
1. I like comedies, because they are _______ (fun).
2. Many _______ (child) like action movies, because they're quite exciting.
3. We're going to see several new _______ (movie) this term.
4. There _______ (be) three comedies.
5. Hero is a very _______ (success) action movie.
气压制动系统中制动拖滞可能的原因是()。
A.回位弹簧过软或折断
B.摩擦片与制动鼓间隙过大
C.制动凸轮轴工作不灵活
D.制动气室膜片不回位
E.制动气室推杆过长