患儿，男，3岁，腹泻3天，给予补液治疗2小时后已排尿，此时输液瓶中尚有不含钾的液体300ml，护士拟向此液体中加入10%氯化钾，该护士可加入的毫升数是（）。
A.3ml
B.4ml
C.5ml
D.9ml
E.12ml
参考答案：D
解析：常用10%氯化钾溶液，静脉滴注时稀释成0.2%～0.3%浓度（即5%葡萄糖溶液100ml中加10%氯化钾2～3ml，300ml则需加入10%氯化钾6～9ml）。
| 阅读短文，然后在下面的表格中完成内容提要，每空不超过3个单词。 | |||||||||||||||
| New Energy in the Twenty-first Century Energy from the wind Wind is a kind of clean energy, and there is lots of it, but, if there's no wind, there is no wind energy. Energy from the water When water moves from a high place to a lower place, it can make electricity (电) without pollution. However, people have to build dams (水坝) to use this energy, and building dams is very expensive. Energy from the earth There is heat in the rocks under the earth. Scientists use the heat to make geothermal (地热的) energy. This kind of energy is cheap, but it is only possible in a few places in the world. Energy from the sun Solar panels (太阳电池板) on the roofs of houses can turn energy from the sun into electricity. Solar power is clean and plentiful (丰富的), but when the weather is bad. It doesn't work. | |||||||||||||||
New Energy in Twenty-first Century
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