肘关节属于()
A、联合关节
B、复合关节
C、滑车关节
D、圆柱关节
参考答案:B
Oh, dear! The key _______ the door _______ in the room. [ ]
A. with, forget
B. to, is left
C. by, forgot
D. with, is left
郭沫若在《游武夷泛舟九曲》一诗中写道:“九曲清流绕武夷,棹歌首唱自朱熹,幽兰生谷香生径,方竹满山绿满溪.”这四句优美的诗中包含了许多物理现象,请写出其中四种物理现象的名称.
(1)______;
(2)______;
(3)______;
(4)______.