任何人在发现直接危及()安全的紧急情况时,有权停止作业或者在采取可能的紧急措施后撤离作业场所,并立即报告
A、人身
B、电网
C、设备
D、交通
参考答案:A, B, C
The nurse is teaching parents how to reduce the spread of impetigo. The nurse should encourage parents to
A. teach children to cover mouths and noses when they sneeze.B. have their children immunized against impetigo.C. teach children the importance of proper hand washing.D. isolate the child with impetigo from other members of the family.
为了探究环境因素对植物光合作用的影响,某学习小组做了相关实验,结果如下:(以氧气释放量来表示光合作用强度,氧气释放量越多,光合作用强度越大)
(1)该学习小组探究的问题是:____________.
(2)从表中的实验结果得出的结论是______
(3)影响光合作用的因素还有很多,请你写出除本实验探究的因素以外的另一种因素:______.
(4)请在下边坐标系中画出氧气释放量与温度关系的曲线图.