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【判断题】
消化系统由消化管和消化腺两部分组成。消化管包括口腔,食管,胃,小肠,结肠。A.
正确
B.
错误
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【单选题】My father often _____ me _____ chess. [ ]
A.
help, at
B.
help, with
C.
helps, at
D.
helps, with