【单选题】列管式换热器在停车时,应先停( ),后停( )
【简答题】膝关节由①___________________、②___________________和③___________________构成;膝关节周围的韧带,前方有④ ,内侧有⑤___________________,外侧有⑥___________________,囊内有⑦___________________和⑧___________________。
【单选题】According to the passage, which is true of the school children?
A.
They prefer reading to watching TV.
B.
They take watching TV only after school.
C.
They would rather watch TV than read books.
D.
They like their teachers who teach them reading.
【判断题】膝关节由股骨下端、胫骨上端和髌骨组成。()
【简答题】列管式换热器在停车时,应先停( ),后停(
)A. 热流体冷流体 B. 冷流体热流体 C. 无法确定 D. 同时停止
【单选题】列管式换热器在停车时,应先停(),后停()