若只检出肉毒梭菌，但未检出肉毒毒素，不能证明此食物会引起肉毒中毒3肉毒梭菌广泛分布于土壤、淤泥及动物粪便中，其中土壤是重要污染源，它可借助食品、农作物、水果、海产品、昆虫、禽类等传播到各处食品在加工、贮藏过程中被肉毒梭菌污染，并产生毒素，食前对带有毒素的食品又未加热或未充分加热，因而引起中毒4肉毒毒素对热很不稳定，通常75-85℃，加热30分钟或100℃，10分钟可被破坏但肉毒杆菌芽孢能耐高温5引起中毒的食品与污染途径： 引起肉毒中毒的食品，因饮食习惯、膳食组成和制作工艺的不同而有差别我国引起中毒的食品大多是家庭自制的发酵食品，如豆瓣酱、豆酱、豆豉、臭豆腐等，有少数发生于各种不新鲜肉、蛋、鱼类食品；日本以鱼制品引起中毒者较多；美国以家庭自制罐头、肉和乳制品引起中毒者为多，欧洲多见于腊肠、火腿和保藏的肉类

Try to use the following expressions1 Do you agree with her2 What do you think of people from foreign countriesAgreement DisagreementI think so, I don't think soI agreeI don't agreeThat's correctOf course notThat's exactly my opinionI'm afraid notYou're quite rightI don't think you are rightStep IV Speaking(B P6)First, get the students to think of four situations among friends in groups of 4 and design a questionnaire to find out what kind of friends their classmates are

2) Ask the students to match each geographic word to the proper meanings1) Students read the sentences loudly together and look at the pictures and the related geographic words in the meanwhile2) Students do the matching work1) To better know how the Mekong river flows2) To help the students better learn the geographic words which are new to them3) To check how the students understand the new wordsStep 8Review the structure of the passage together with the students and show some key words on the screenProvide the students with some words and phrases which are the new words in this unitAsk them to retell the main content of the passage in groupsWith the teacher， students review the structure of the passageRetell the main content of the passage in groupsTo help students form the schema of the passage by reviewing the structure of itTo know the content of the passage better as well as to create more chances for the students to use the new wordsStep 91) Ask the students what they learn from the story2) Give the students some useful and related proverbs1) Students share their opinions with the group members what they have learned from the story

补肾的中药有哪些_补肾的15种中药运动、 按摩 、饮食都是 补肾 的方法，我们也可以通过 中药 来补肾，那么，补肾中药有哪些下面我为大家盘点15种补肾中药补肾的15种中药补肾的中药1、枸杞子性平，味甘，具有补肾养肝、益精明目、壮筋骨、除腰痛、久服能益寿延年等功用尤其是中老年 肾虚 之人，食之最宜如《本草通玄》记载：“枸杞子，补肾益精，水旺则骨强，而消渴、目昏、腰疼膝痛无不愈矣”《本草经疏》中也说：“枸杞子，为肝肾真阴不足，劳乏内热补益之要药，老人阴虚者十之七八，故服食家为益精明目之上品”补肾的中药 2、黄芪是一种古老的中药黄芪的主要治疗作用为补中益气，固表止汗、托毒排脓、利水消肿四大功能以治疗中气不足，如胃有下坠感，上气不接下气等症状较好

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