理学
名词解释题表观遗传变异（epigenetic variation）
题目
参考答案和解析
相似问题和答案
第1题：
A、表观遗传学是渐变的遗传过程而非突变的过程。表观遗传变异具有可逆性。
B、表观遗传改变多发生在基因调控区(如启动子)
C、遗传突变多发生在编码区内
D、以上全是
第2题：
The term sociolect is used for less drastic difference which is restricted to variation in pronunciation.()
第3题：
For a given characteristic in a construction process, the standard deviation associated with production variation is 0.8", and the standard deviation associated with measurement variation is 0.6". The total standard deviation for this characteristic is:
A . 1.4"
B . 1.2".
C . 1.0"
D . 0.8"
E . 0.2"
第4题：
Compass error is equal to the ______.
A.deviation minus variation
B.variation plus compass course
C.combined variation and deviation
D.difference between true and magnetic heading
罗经差等于磁差和自差的结合。
第5题：
变异分可遗传变异与不遗传变异，不遗传变异是由遗 传物质引起的;可遗传变异是由环境条件引起的。
此题为判断题(对，错)。
第6题：
[A] variation
[B] balance
[C] frequency
[D] stability
28．C 【精析】variation变化；balance平衡；frequency频率；stability稳定。这里指的是潮汐电站只能规划建于潮汐发生频率高的河流入口处，故选C。
第7题：
The term geographical dialect is used for less drastic difference which is restricted to variation in pronunciation.()
第8题：
143 For a given characteristic in a construction process, the standard deviation associated with production variation is 0.8", and the standard deviation associated with measurement variation is 0.6". The total standard deviation for this characteristic is:
A. 1.4"
B. 1.2".
C. 1.0"
D. 0.8"
E. 0.2"
第9题：
The compass rose on a nautical chart indicates both variation and ______.
A.deviation
B.annual rate of variation change
C.precession
D.compass error
第10题：
How is variation indicated on a small-scale nautical chart?______.
A.Magnetic compass table
B.Magnetic meridians
C.Isogonic lines
D.Variation is not indicated on small-scale nautical charts
在小比例尺海图上磁差如何表示？等磁差线