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【多选题】
下列关于双重抑郁症的说法中正确的是：( )A.
双重抑郁症和双相障碍是两个不同的概念
B.
双重抑郁症是指既有环性心境障碍又有抑郁发作
C.
双重抑郁症是指既有恶劣心境又有抑郁发作
D.
双重抑郁症的典型表现是恶劣心境出现在先，然后出现一次或多次抑郁发作
E.
双重抑郁症的典型表现是环性心境障碍出现在先，然后出现一次或多次抑郁发作
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举一反三
【简答题】The commander ordered that we (withdraw) ______ as soon as possible.
【简答题】The order from the commander was that the troops ______ (立即开拔去前线).
【简答题】生后第一年身高生长约:
【简答题】The commander ordered his troops stationed on the top of the hill. A B C D
【单选题】The commander of a rescue unit designated to co-ordinate search and rescue operations within a specified area is the（）.
A.
General commander
B.
Commander general
C.
Search commander
D.
On-scene commander
【单选题】The attainable production points on a production possibility curve are:
A.
the horizontal and vertical intercepts.
B.
the points along the production possibilities frontier.
C.
the points outside the area enclosed by the production possibilities frontier.
D.
the points along and inside the production possibility frontier.
【多选题】The production can be generally classified into three different kinds of production types:
A.
Single production
B.
Job production
C.
Batch production
D.
Mass production
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