市场调查与民意调查的区别主要有两个方面:一是();二是()。
参考答案:调查结果和使用者不同;调查的最终目标不同
Read and choose.
Fei Junlong and Nie Haisheng went into space in Shen Zhou VI. They were m space for five days.
Every day they had many things to do.
They had only six hours to sleep. But they had a great time in space! They ate good food every day
becausethere were many different food in the spaceship. Sometimes they had chicken and rice for lunch!
(1) Nie Haisheng didn't go into space. Yes□ No口
(2)They went to the moon. Yes口 No口
(3) They had six hours to sleep everyday. Yes口 No口
(4)They did not eat in the space. Yes口 No口
(5)They are chicken sometimes. Yes口 No口
发电厂、变电所中,对于10kV线路相间短路保护装置的要求,下列哪项是错误的?()
A.后备保护应采用近后备方式
B.对于单侧电源线路可装设两段电流保护,第一段为不带时限的电流速断保护,第二段为带时限的过电流保护
C.当线路短路使发电厂厂用母线或重要用户母线电压低于额定电压的60%,以及线路导线截面过小,不允许带时限切除故障时,应快速切除故障
D.对于1~2km双侧电源的段线路,当有特殊要求时,可采用差动保护为主保护,电流保护为后备