①若该商品价格由PA向PB运动时,会导致其需求量增加
②若该商品需求量由QB向QA运动时,会导致其价格上涨
③若该商品的价格由PB向PA运动时,会导致其替代商品需求量增加
④若该商品需求量由QA向QB运动时,会导致其互补商品需求量减少
A:①②
B:②③
C:①③
D:②④
如图为水位报警装置原理图,其中A、B为两个金属杆.当水位达到或超过警戒线时,绿灯、红灯和电铃的工作状态分别是____ ____ ____
根据短文理解,选择正确答案。
She is Li Xinqi. Her English name's Olivia. She is a lovely girl. She was born(出生) on January 12th, 2012 in USA. She is gymnastics champion(体操冠军) Li Xiaopeng and Angelita Li's daughter. In April, 2014, she goes to record the TV program(录制节目), "Dad came back". After that,she is loved by everyone.
The girl is Jia Yunxin. She was born on October 23rd, 2012 in Beijing. Her parents are Jia Nailiang and Li Xiaolu. They are actors(演员). She also comes to “Dad came back” in Zhejiang TV. She is very cute, sometimes gentle, sometimes tough(强硬的). People like her.
The boy is Du Yuqi, but we all call him “Uh huh”. He was born on the morning of September 19th, 2013 in Beijing. He is Du Jiang and Huo Siyan's son. They are actors, too. He looks very handsome(帅), and he records “Dad came back” second season with his father. Everyone likes him very much.
通过如图所示的探究,我们对太阳光有了更多的了解:
给划线字注音
____
羚羊
猛蹬
下坠
心理学家卡特尔认为,①____。一种是流体智力:指一般的学习和行为能力,它是一种潜在的智力,一般在20岁后达到顶峰,30岁后降低,这是不可逆的。另一种是晶体智力:指已经获得的知识与技能,②____,主要由后天教育和经验决定的,一生中一直在发展,③____,只是到了25岁后,发展的速度渐趋平缓。