【多选题】【消耗次数:1】
减少蔬菜农药残留的方法有()
A、去皮
B、水洗
C、用盐洗
D、阳光晒
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相关题目
【判断题】 农药残留和溶剂残留常用的方法是GC法
①  正确
②  错误
【单选题】 法定的农药残留测定的方法是
①  滴定分析法
②  MS法
③  GC法
④  HPLC法
⑤  UV分光光度法
【单选题】 农药残留的检测方法通常分为()两大类。
①  A.生化测定、理化分析
②  B.理化分析、生物测定
③  C.物理检测、生化测定
④  D.物理检测、生物测定
【多选题】 如何防止农药残留超标()
①  A正确选择和使用药剂
②  B严格遵守安全间隔期
③  C安全配制和使用
④  D采取综合防治和绿色防控
【判断题】 确定农药安全间隔期是最大限度地避免农产品的农药残留、减少残毒的重要环节
①  正确
②  错误
【多选题】 《农药安全使用规定》中规定高残留农药不准用于哪些作物()。
①  A蔬菜
②  B茶叶
③  C果蔬
④  D中药材
⑤  E烟草
【多选题】 农药残留量测定法中,农药包括
①  有机氯类
②  有机硫类
③  有机磷类
④  拟除虫菊酯类
⑤  砷盐
【多选题】 农药残留量测定法中,农药包括
①  有机氯类
②  有机硫类
③  有机磷类
④  拟除虫菊酯类
⑤  砷盐
【判断题】 低残留农药是指在施用后降解速度快、在食品中残留量少的农药。
①  正确
②  错误
【判断题】 遵守农药使用安全间隔期是避免农药残留超标的有效措施
①  正确
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随机题目
【单选题】 When is appropriate for the teacher to give classroom instructions to students?
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②  Providing explanations to a concept or language structure, drawing attention
③  Setting requirements, checking comprehension, assigning homework
④  All of the above.
【单选题】 What are not good rules to follow for making instructions effective?
①  Use simple instructions and make them suit the comprehension level of the students
②  Use the mother tongue only when it is necessary
③  Use body language to assist understanding
④  Not model the task or activity before letting students move into groups or pairs .
【单选题】 What role does a teacher play in the following activity? When the students have in groups decided where to go for a spring outing, the teacher asks each group to tell the others why they have made such a choice.
①  Controller
②  Assessor
③  Organizer
④  Prompter.
【单选题】 What role does a teacher play in the following activity? The teacher asks students to produce conversations (either orally or in writing) by using particular patterns or expressions they have just learned.
①  Controller
②  Assessor
③  Organizer
④  Prompter.
【单选题】 What role does a teacher play in the following activity? When students are doing a group-work task, the teacher joins one or two groups for a short period of time.
①  Controller
②  Assessor
③  participant
④  Resource-provider.
【单选题】 What role does a teacher play in the following activity? The teacher has a word in his mind and asks students to guess by asking only Yes/No questions until they make the correct guess.
①  Controller
②  Assessor
③  participant
④  Resource-provider.
【单选题】 Which of the following is the advantage of pair work?
①  It is an ideal way to show materials and do presentations together
②  It allows students to work together rather than under teacher’s guidance
③  It reinforces a sense of belonging among a group of members
④  It is very stressful.
【单选题】 Which of the following is the time when students work in a pair?
①  When all the students are under the control of the teacher
②  When students work in pairs on an exercise or a task
③  When students work in small groups
④  When students are expected to work on their own at their own speed.
【单选题】 What role does a teacher play in the following activity? The teacher writes one of five numbers (1-5) on a number of cards (the same number as the students). Each student draws one card. Those who have drawn number 1 will form group1, and those who have drawn number 2 will form group 2. Thus the students are put into five groups in a random way.
①  Controller
②  Assessor
③  Organizer
④  Prompter.
【单选题】 What are language contents?
①  Structures, vocabulary, functions and topics
②  Pictures, vocabulary, communication and topics
③  PPT, structures, aims and summary
④  Structures, aims, functions and topics.