【简答题】According to Kid fluence, 'persistence nagging' is less effective than the more sophisticated 'importance nagging'.
【单选题】According to the passage, unresponsive care from a mother may ______.
B.
harm the mother-child tie
C.
injure a baby's emotional reaction
D.
spoil a child's personality
【多选题】Check the true statements.
A.
It’s a description of the first few days at college.
B.
It’s a personal and private story.
C.
The writer uses past tenses.
E.
It’s written in the third person.
【单选题】According to the passage, unresponsive care from a mother may ______.
B.
harm the mother-child tie
C.
injure a baby's emotional reaction
D.
spoil a child's personality
【单选题】关于机械调速器的工作特点不正确的是( )。答案
【单选题】【全体】VBSE中,部门经理的薪酬水平是
【简答题】探究:音调是怎样变化的. 提出问题:要改变音调,就必须改变振动频率. 猜测和假设:振动频率与物体紧密、长度、厚度有关. 探究器材:粗、细、长短不同的弦若干根、一张共鸣板. 设计实验: 实验一:物体越绷紧,振动越快,它的音调越高,反之音调越低. 器材:弦A和弦B的粗细、长度相同,弦A比弦B绷得紧. 做法:拨动这两根弦,如图所示. 实验二:物体越短,振动越 ______,它的音调越 ______,反之...