It is difficult ______a world record and even more difficult to ______it.A. keeping, setB. keep, setC. set, keepD. to set, keep
It is difficult ______a world record and even more difficult to ______it.
A. keeping, set
B. keep, set
C. set, keep
D. to set, keep
相关考题:
Which DBMS_SCHEDULER procedure(s) can be used to alter an existing job? () A. SET_ATTRIBUTE_NULLB. ALTER_JOBC. ALTER_JOB_PARAMETERSD. ALTERE. SET_ATTRIBUTE
下列Python程序的运行结果是: s1 = set(['a', 'a', 'c', 'd', 'c', 'd'] ) print(s1)A.set()B.{'a', 'a', 'c', 'd', 'c', 'd'}C.{'a', 'c', 'd'}D.['a', 'c', 'd']
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