Section13 V; H6 [) b* I8 @& a, k
上期复习
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Just as they had been for years, the customary steps were followed—that is, the usual procedures were carried out.
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惯例的 ; Q# n5 A6 K' ?, g/ a# ^0 o( |
Section2. T3 r; `: k$ F6 N+ r3 C' m
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The animals looked healthy. They exhibited, or ________________, no symptoms of disease.( y$ N! ~$ g$ v ?
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p/ N/ q9 t; W- L(b) hid
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(d) showed
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