下列不是食品保鲜方法的是( )
A:盐渍
B:冷冻
C:煮熟
D:利用溶菌酶进行保鲜
翻开美国历史,共有九位美国总统曾在美国众议院被提案弹劾。其中包括胡佛、杜鲁门、尼克松、里根、老布什和克林顿。民主党和共和党领袖都未能幸免。它体现出了美国政体的重要原则是( )
根据句意及首字母提示完成单词
①He asked p____ to leave the room.
② The government still face very s____ difficulties.
③We p____ £35 for each ticket.
④The country is facing great economic d____.
⑤Peter o____ to teach them water-skiing.