????
? (nicotine)?? (nicotiana alkaloids)12???????1928????t???^
???????c?40mg
????????????????247/745mmHg???? ???60?????????????????????
??????2%~3%???5% NaOH??????????2g????????????????????????
??
???????????
??2g5% NaOH?20mL15mL????
1??25mL?2g?2mL 5% NaOH?10min??????1????????4mL???????????
2????25mL??15mL??????????????25mL??2
3?????????3???
4??2?1mL???????????25mL?1mL???????4
5????2mL??????????????????????????217~220
6???10mL??4mL 50%?-?V/V???????????????...
???????c?40mg
????????????????247/745mmHg???? ???60?????????????????????
??????2%~3%???5% NaOH??????????2g????????????????????????
??
???????????
??2g5% NaOH?20mL15mL????
1??25mL?2g?2mL 5% NaOH?10min??????1????????4mL???????????
2????25mL??15mL??????????????25mL??2
3?????????3???
4??2?1mL???????????25mL?1mL???????4
5????2mL??????????????????????????217~220
6???10mL??4mL 50%?-?V/V???????????????...
“????” 的相关文章
??
????????????????????????????????????
~???~???? ?~
~???~???? ?~
???
,??,??????????,16??,?.
?????
?????????
?????????????6???12????????????????????
?????
?????????
?????????????6???12????????????????????
MM?????
??????? ?????????????????????B?v???????? ??????? ???????????? ??????????????????????????? ??????? ???????? ????? http://www.aishang.cn/question/6104 ??
????????
?????
??
胎儿要生了，但B超照出来宝宝头大脚短生出来会畸形吗
不要担心，如果有问题医生会告诉你的。