【简答题】如图1像表示盐酸和氢氧化钠溶液发生反应过程中溶液的pH变化.请从图象中获取信息,回答下列问题: (1)进行该反应的实验操作是按照以上图2中______(填甲或乙)图所示进行,烧杯中溶液的颜色变化是______. (2)曲线上C点表示______ (3)用溶质的质量分数为36.5%的盐酸40g与足量氢氧化钠溶液恰好完全反应,需要溶质的质量分数为20%的氢氧化钠溶液______g. (4)甲乙丙丁四位...
【单选题】Some morphemes have _______ as they are realized by more than one morph according to their position in word.
【判断题】锯弓的往复长度不应小于锯条长度的三分之二()
【单选题】第45回 下列选项中哪个是虎力大仙先登台弄来的?
【单选题】Which statement below is correct about the form -er in the words listed here: teach er , bigg er , eras er , London er ?
A.
All these words have the same morpheme.
B.
Every word listed in this question has an allomorph of {-er}.
C.
Some different morphemes can be represented by the identical form.
D.
-er here is used to form new words, hence a derivational affix.
【判断题】捻缩:多根长丝或纱线经过加捻后,使原先平行于纤维线的纤维沿轴向扭转变成螺旋状,各根纤维沿轴向的投影长度较加捻前长度缩短称捻缩。