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【判断题】
滑片式压缩机转子转动时滑片将气缸分成几个腔室,腔室空间变大形成真空吸进制冷剂。A.
正确
B.
错误
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举一反三
【单选题】The English vocabulary is known for a (an) ______ of words which are comparatively seldom used in ordinary conversations.
A.
multitude
B.
altitude
C.
latitude
D.
platitude
【单选题】The English vocabulary is a(an) ______ system of codes.
A.
ideographic
B.
phonographic
C.
semantic
D.
phonetic
【单选题】Theis is one of the most interesting questions that ____ asked.
A.
have
B.
has
C.
have been
D.
has been
【单选题】The Chinese vocabulary is a(an) _______ system of codes.
A.
ideographic
B.
phonographic
C.
semantic
D.
phonetic
【简答题】English vocabulary is a(an) _________ system of codes.
【简答题】根据下图推测，CsCl晶体中两距离最近的Cs ＋ 间距离为a，则每个Cs ＋ 周围与其距离为a的Cs ＋ 数目为________；每个Cs ＋ 周围距离相等且次近的Cs ＋ 数目为________，距离为________；每个Cs ＋ 周围距离相等且第三近的Cs ＋ 数目为________，距离为________；每个Cs ＋ 周围紧邻且等距的Cl － 数目为________。
【单选题】The doctor _______ on the man and _______ saved his life.
A.
did a operation; /
B.
did an operation; was
C.
operated; /
D.
operated; was
【简答题】Chinese vocabulary is a(an) _________ system of codes.
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