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【简答题】
用卡诺图化简逻辑函数时,____ ,则与项个数越少;若每个方格群尽可能选大,则在化简后的最简表达式中__________.
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举一反三
【简答题】下列程序的功能是统计字符串中“array”的个数,在程序的空白处应填入的正确选项是( )。public class Fi ndKey Words{public static void mai n(sri ng[]args){sti ng text ="An array is a data structur that stores a collection of"+"values of the s...
【多选题】Which of the following may appear in a technical memo heading? _______________
A.
Opening Segment
B.
Current date
C.
Necessary attachment
D.
Subject line
【多选题】Which of the following may appear in a technical memo message? _____________
A.
Opening Segment
B.
Summary Segment
C.
Discussion Segment
D.
Closing Segment
【单选题】Which of the following is a reasonable way to explain the ability of enhancers to act at a distance?
A.
The activator binds to an enhancer, changing the supercoiling state of the DNA and opening up the promoter to general transcription factors.
B.
The activator binds to an enhancer, slides along the DNA until it encounters the promoter, and activates transcription.
C.
An activator binds to an enhancer, creating loops in the DNA, which leads to the interaction of proteins at the promoter and activation of transcription.
D.
An activator binds to an enhancer and a downstream segment to form a loop, which causes the protein to track toward the promoter and activate transcription.
E.
All of the choices explanations are possible.
【单选题】It's a good idea to include some information about the context, a task statement and perhaps a purpose statement in the _________________ of a technical memo.
A.
Opening Segment
B.
Summary Segment
C.
Discussion Segment
D.
Closing Segment
【多选题】The Opening Segment of a technical memo may include ______________________.
A.
the context
B.
a task statement
C.
current date
D.
a purpose statement
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