下列属于国标安全色()种颜色。
A.红
B.黄
C.绿
D.紫
E.蓝
参考答案:A, B, C, E
She ____ her husband three years ago, and soon ____ a man with a lot of money.
A.divorced; married
B.divorced, got married
C.was divorced, was married
D.was divorced, married
下图表示某陆生植物的非绿色器官呼吸过程中的O2的吸收量和CO2的释放量之间的关系,其中线段XY、YZ的长度相等,则在氧的浓度为a时()
A.有机物大多被用于有氧呼吸
B.有氧呼吸与无氧呼吸产生的水一样多
C.有氧呼吸与无氧呼吸释放的能量一样多
D.有氧呼吸与无氧呼吸释放的二氧化碳一样多