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【简答题】
病毒的灭活是指病毒在理化因素作用下失去:
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举一反三
【简答题】a. (of a roof) constructed with a single slope on each side of the ridge supported at the end by a gable or vertical triangular portion of an end wall
【简答题】a roof with a single slope attached to a wall or a building l
【单选题】Churchill recommends that in their spaer time _________________.
A.
people who work with their hands should play football
B.
politicians should think about unimportant things
C.
people need a hobby that is different from their work
D.
people who are bored can take lessons
【单选题】Churchill recommends that in their spare time ____.
A.
people who work with their hands should play football
B.
politicians should think about unimportant things
C.
people need a hobby that is different from their work
D.
people who are bored can take lessons
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