????
? (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???????????????...
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n. [C]
1.,
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The girl was startled when the balloon exploded.
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Trade deficits have ballooned.
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He balloons his cheeks when he is hesitant.
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The girl was startled when the balloon exploded.
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3.(???)??
4.;?
? vi.
1.()[(+out/up)]
2.;
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Trade deficits have ballooned.
?
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1.?()
He balloons his cheeks when he is hesitant.
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2.?
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???2.54.0,?360??????,??;????????????t??? ???? ?(Trichechidae)13,?(?),??????,???;?,??????,?????????]??? ?(Dugongidae)11?????????????????????2745?????????? ????3,?(?),???????,???;?,??????,?????????]??? ???????????????2745????????????????????????????1?1????1,?????,?,???????????1016?? ?...
???2.54.0,?360??????,??;????????????t??? ???? ?(Trichechidae)13,?(?),??????,???;?,??????,?????????]??? ?(Dugongidae)11?????????????????????2745?????????? ????3,?(?),???????,???;?,??????,?????????]??? ???????????????2745????????????????????????????1?1????1,?????,?,???????????1016?? ?...