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【判断题】
三相电源的相电压是指火线与中线间的电压,线电压是指火线与火线间的电压。A.
正确
B.
错误
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举一反三
【单选题】Most people think ______ first impressions are the most lasting and far influential to ______ people's life. [ ]
A.
the, a
B.
the, /
C.
/, /
D.
/; the
【单选题】People seem to think the findings of the survey are ______.
A.
unbelievable
B.
confusing
C.
surprised
D.
baffled
【单选题】This kind of exercise is most _______, and therefore is a good test of your students’ ability.
A.
surprising
B.
encouraging
C.
exciting
D.
challenging
【单选题】There was an immediate _____ when the alarm sounded. People fled in different directions. [ ]
A.
surprise
B.
joy
C.
panic
D.
wonder
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