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【简答题】
Please remain __________ until the plane has come to a complete stop. A．to seat B．to be seated C．seating D．seated
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【单选题】The sudden of the headmaster gave the children who were talking loudly in the classroom a great surprise.
A.
entrance
B.
entry
C.
absence
D.
trial
【单选题】To our _____ , the naughty boy finished his homework by himself and there were no mistakes. [ ]
A.
surprised
B.
surprising
C.
surprise
D.
surprises
【简答题】简述胃液、胰液、胆汁的主要成分和作用？胃液、胰液中哪些成分本身无活性？需要哪些物质激活？
【简答题】气流干燥器:颗粒在气流中高度分散,传热传质表面很大,传热传质速度很高,干燥时间(),一般仅为()
【简答题】()干燥器:颗粒在气流中高度分散,传热传质表面很大,传热传质速度很高,干燥时间极短,一般仅为几秒
【简答题】简述胰液的主要成分和作用
【简答题】简述胰液的主要成分和作用。
【单选题】To our great________, his parents were________at his mark. [ ]
A.
surprises; surprised
B.
surprises; surprising
C.
surprise; surprised
D.
surprise; surprising
【简答题】简述胰液的主要成分和作用。
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