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A:Where does Mark get his hair cut?
B:He cuts it______
A. alone
D. himself
C. itself
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4．—_________ Mike________ his homework in the evening?—No，he doesn't．A． Do；doesB． Does；doC． Do；doD． Does；does
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4． Tom doesn’t like the film_________，but his parents like _________ ．A．himself; itB．itself; themselvesC．itself ; itD．himself ; themselves
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You are signing on a deck officer，who will be designated as one of the GMDSS operators，before sailing foreign．Which statement is TRUE ________．A.He/she must have an STCW certificate endorsed as“Valid for Service on Vessels Operating in the GMDSS System”B.He/she must present either an FCC-issued license or a Coast Guard-issued licenseC.You must consult the“List of Qualifications”on the reverse of his/her FCC-issued licenseD.His/her Merchant Mariners Document must have an added endorsement as “Radio Electronics Officer”
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Which of the following may illustrate the difference between "competence" and__________ "performance"?
A．What a person "knows" and what he/she "does".
B．What a person "can do" and what he/she "does".
C．What a person "does" and what he/she "knows".
D．What a person "does" and what he/she "can do".
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The working parent is not willing to listen to her (his) four-year-old child talking about hissandbox games because she (he) is___________.A.boring
B.very tired
C.busy
D.angry
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6、对于下述命令，如何利用pipe符号进行改写： by_cut ＜- group_by（diamonds, cut) count_cuts ＜- mutate（by_cut, N = n（))A．count_cuts ＜- diamonds %＞% group_by(cut) %＞% mutate(N = n())B．count_cuts ＜- diamonds %＞% mutate(N = n()) %＞% group_by(cut)C．count_cuts ＜- diamonds %＜% group_by(cut) %＜% mutate(N = n())D．count_cuts ＜- diamonds %＜% mutate(N = n()) %＜% group_by(cut)
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“数据库操作”案例中使用的collection.where.get方法可以获取根据查询条件筛选后的集合数据。
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