下列关于电解KNO3溶液时的叙述正确的是A.向阴极移动,K+向阳极移动,分别在对应的极上析出B.随电解的进行,溶液的pH减小C.OH-向阳极移动,阳极附近溶
Mary is an honest girl; I say it, ________I don't like her. A.even though B.as if C.as long as D.as though
小滨所观察到的人体口腔上皮细胞与洋葱表皮细胞结构不同,因为人体口腔上皮细胞不具有A.细胞核B.细胞壁C.细胞膜D.细胞质
有一批材料可以建成200 m的围墙,如果用此材料在一边靠墙的地方围成一块矩形场地,中间用同样的材料隔成三个面积相等的矩形(如图所示),则围成的
25. The article is too long, please cut _____ some unimportant details. A. out B. in C. up
兴奋在中枢神经系统的传导过程中,有时存在一个突触引起的兴奋被后一个突触抑制的现象。下图是突触2抑制突触1兴奋传导的过程示意图,请回答:
设等差数列{an}的前n项和为Sn,若a6+a14=20,则S19=___________.
Since the day I was ________ to this school, I have owned a lot of memeries here. A. admitted B. received C. permitted