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【单选题】
Cracks may be prevented from developing at the corners of welded plating inserts by ______.A.
squaring the corners
B.
rounding the corners
C.
plug welding the corners
D.
slot welding the corners
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A.
made no mention of
B.
gave no peace to
C.
was caught in
D.
was stuck with
【单选题】Wenn die Studiernden ein Vorlesung oder ein Seminar mit Erfolg besucht haben, erhalten sie ______________________.
A.
ein Abschlusszeugnis
B.
eine Note
C.
einen Schein
D.
eine Zulassung
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【单选题】The teacher propose that Jack ___ maths or physics instead of English because he was quick at numbers.
A.
must study
B.
could study
C.
studied
D.
study
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