如图表示在20℃时某植物光合作用强度与光照强度的关系。对于曲线的下列各项叙述正确的是( )
A:当植物缺镁时,B向左移
B:A点叶肉细胞产生ATP的细胞器有线粒体和叶绿体
C:其他条件不变,环境温度升高到30℃,A点位置下移
D:B点植物既没有进行光合作用,也没有进行呼吸作用
八年级学生冬冬在假期参与了志愿服务活动,并深刻体会到自己及承担了社会责任,又在奉献中提升了价值。下列名言与这一观点相符的是( )
我国在处理民族关系时坚持的一项基本国策和基本政治制度是( )
Maria lives in the beautiful countryside.She usually gets up early in the morning,1she's never late for schoo1.After getting up,she often showers and has a good breakfast.Then she2 for school at around 6:303her home is very far from schoolshe likes riding her bike better than4the bus.It takes her about an hour5her bike.It's so long! On the way,she sings and sings so she always feels6.Also she thinks that it's good for her health7to school by bike. After school she usually goes back8with her friend,Linda.Linda’s home is nearer than Maria's. It's only three miles from her home9schoo1.Linda likes riding,too.And she also thinks that it is a good10of transportation.
①国家观念 ②公民道德 ③民主意识 ④法律意识