[单选题]术中快速冷冻切片标本保存液（ ）
A.甲醛溶液
B.稀盐酸
C.生理盐水
D.蒸馏水
E.不使用保存液

{{B}}Agitated Sunspot Cause Trouble{{/B}}
If the lights in your house keen flickering, blame frequent sunspots. A sunspot is actually charged particles flying at the speed 6f 3 million kilometers an hour out of the surface of the sun to form sun storms.{{U}} (1) {{/U}}.
The earth, which is directly energized by the sun, is influenced by sun storms in a number of ways.{{U}} (2) {{/U}}Wireless short-wave communication, which depends on the wave’s reflection against this layer of atmosphere, is likely to be jammed. It is said that mobile phone communication may be affected too.{{U}} (3) {{/U}}According to a research conducted by the Russian scientists from 1957 to 1960, the frequency of earthquakes can be linked to the movement of the sunspots.
Though little research has been carried out about how exactly the sunspot will negatively h