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【多选题】
While delivering the self-introduction speech, the speaker should:A.
present the speech in a polite and relaxed manner.
B.
maintain eye contact with the audience throughout.
C.
prepare the speech well in advance.
D.
practice it for several times before facing the actual audience.
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【单选题】What can robot do?
A.
Walk or roll on wheels
B.
Do housework, such as cleaning, washing.
C.
Both A and B.
【单选题】What can robot do?
A.
Walk or roll on wheels
B.
Do housework, such as cleaning, washing
C.
Both
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