【判断题】( )5.三相异步电动机转轴上产生的的电磁转矩是决定电动机输出的机械功率大小的一个性能指标。
【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...
【判断题】亚里士多德认为生物性是人与动物的本质区别。( )
【多选题】下列语句和典故体现“自强不息”的民族精神的是
【多选题】Which of the following may appear in a technical memo heading? _______________
【单选题】三相异步电动机的转速达到最高时,转轴上产生的电磁转矩()
【多选题】Which of the following may appear in a technical memo message? _____________
【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.
【多选题】The Opening Segment of a technical memo may include ______________________.