公称直径大于或等于（）mm的闸门，宜采用电动驱动装置。
A．500
B．300
C．400
D．450
参考答案：A
Vasodilation or vasoconstriction produced by an external cause will interfere with an accurate assessment of a client with peripheral vascular disease (PVD). Therefore, the nurse should（）
A. keep the client warm.
B. maintain room temperature at 78°F (25.6℃).
C. keep the client uncovered.
D. match the room temperature with the client’s body temperature.
下面是小红参加红色旅游活动时拍摄的两幅照片以及作的题记。
这两次会议在党的历史上各有什么重大意义？
