皮皮学，免费搜题
登录
搜题
【单选题】
What is the correct definition of nozzle area expansion ratio?A.
The ratio of nozzle exit area to the throat area
B.
The ratio of the nozzle area at the inflection point to the throat area
C.
The ratio of throat area to the nozzle inlet area
D.
The ratio of throat area to the area at the point of inflection
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】（单选）某二元连续精馏塔，塔顶采用分凝器，塔底间接蒸汽加热，完成分离任务需要的理论板数为N，则塔内的理论板数为（）
A.
N ；
B.
N － 1 ；
C.
N － 2 ；
D.
N +1 ；
【单选题】. Six players can _____ a volleyball team while a football team is ______ eleven players.
A.
make up; made up
B.
make up of; made up
C.
make up; made up of
D.
make up of; made up of
【简答题】紫色宝宝的爸爸妈妈是什么颜色呢?A. B. C. D.
【单选题】Our team _______ five persons.
A.
are made up of
B.
is made up of
C.
made up of
D.
make up of
【单选题】Five players can a basketball team while a football team eleven players. [ ]
A.
be made up of; is consisted of
B.
make up; consists of
C.
consist of; is made up
D.
make up of; consists of
【单选题】(单选)某二元连续精馏塔,塔顶采用分凝器,塔底间接蒸汽加热,完成分离任务需要理论板数为N,则塔内的理论板数为:
A.
N；
B.
N－1；
C.
N－2；
D.
N+1；
【单选题】Both Class 3 and our class won't be able to finish the work unless they ___ each other.
A.
team up with
B.
come up with
C.
put up with
D.
catch up with
相关题目：