（）refers to varieties of language defined by their topic and context of use.

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第1题

[判断题] In order to keep students interested in learning English it is important to include a variety of activities and techniques in the lesson.（）

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第2题

[] This Certificate will remain in force until May 1，2009. （）.

A、A.This Sentence refers to the validity of the Certificate B、B.This Sentence refers to the time of the Certificate C、C.This Sentence refers to the date of the Certificate D、D.This Sentence refers to the issue of the Certificate

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第3题

[单选题] An administrator analyzes a poorly performing system and suspects that the issue is related to CPU resource. Upon reviewing output of vmstat, the administrator is concerned with the values in the ‘pc’ and ‘ec’ columns. Which definition describes these two headings?（）

A、'pc' refers to the number of physical processors consumed, while 'ec' refers to the percentage of entitled capacity consumed. B、'pc' refers to the 'physical CPUs' and lists how many are left un-allocated, while ec' refers to the 'entitled CPUs' and lists what amount is currently allocated to the LPAR. C、'pc' refers to the 'processor count' and reflects how many CPUs are allocated to the LPAR, while 'ec ' refers to the 'extra capacity' and lists how much above the LPAR entitlement is being consumed. D、'pc' refers to 'processor cards' and reflects how many MCM modules are actually being used by this LPAR, while 'ec' refers to the 'entitled CPUs'and lists what amount is currently allocated to the LPAR.