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问题 单项选择题

在计算变电所蓄电池容量时，下列哪些负荷不应按经常性负荷统计？（）

A.带电的继电器、信号灯

B.经常直流照明灯

C.断路器合闸时的冲击电流

D.接入变电所直流系统的交流不停电电源

答案

参考答案：C

单项选择题

A client with multiple sclerosis has been prescribed baclofen. The nurse teaches the client about the action of the drug. Which of the following is an accurate instruction regarding this drug’s action

A. "Baclofen will decrease your fatigue and help increase your energy levels. "
B. "Baclofen will help relieve the muscle spasms that you have been experiencing. "
C. "It is an antibiotic that will help treat your urinary tract infection. "
D. "Taking this drug will help decrease the visual problems you have been having. "
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填空题

A、B、C、D都是初中化学中的常见物质，具有如图所示的转化关系（反应条件，其他反应物及多余产物均已略去）：

（1）若A是一种白色难溶于水的钙盐，由三种元素组成，C是一种参与植物光合作用的气体．则 A、B、C、D分别是：

A______；B______；C______；D______．

（2）若A是人类赖以生存的一种无色液体，D是一种黑色固体．则 A、B、C、D四种物质分别是：

A______；B______；C______；D______．
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