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【判断题】
ZY（J）7 型电动液压转辙机由ZY（J）7型电动液压转辙机（亦称主机，用于第一牵引点）和SH6型转换锁（亦称，用于第二、三等牵引点）组成。主机与使用各自的动力系统。A.
正确
B.
错误
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举一反三
【单选题】What does it mean for a presentation to be audience-centered?
A.
the presenter assumes what the audience wants to hear.
B.
the presentation is centered on the topic.
C.
the presenter researches the audience's demographics, needs, motivations and characteristics.
D.
the presenter lets the audience members ask questions at the end.
E.
the presentation starts off with audience questions.
【单选题】The previous lecture focused on the reading problems in new words, while this lecture will turn to ________ in complex sentence structures. [ ]
A.
that
B.
one
C.
those
D.
ones
【简答题】()密钥加密，是指加密解密双方拥有不同的密钥。 A.软件 B.非对称 C.网络 D.对称
【单选题】Mike finds reading English newspaper _______, because there are lots of new words.
A.
frustrating
B.
exciting
C.
interesting
D.
happy
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