D128(1b-u9d3)V-learn小西妈双语工程1907期+112+Eric20.5.25打

宝贝疙瘩蛋

2020.5.25打卡记录

--指读 (week 8) G1 26-40；

--短元音 ap, 复习 ad, ag。

1. Listening & Vedio：

--1b-unit9 baby bye-day3

本单元重点：身体部位，苍蝇特征，看相关的词语，摇篮曲。

--ABC song, 字母发音歌，peppa-pig1动画S1-36-39集视频；

--清华汉语2-3早读晚诵。

2. Reading:

海尼曼中-4本+牛4-8本。

3. Supplementary

(1) Types of Flies and facts about fly

• Over 100,000 species of flies live on earth.
  
• Flies lay their eggs on fruit, food, other animals and even rotting flesh. Their larvae are known as maggots /ˈmæɡət/蛆 . They look like bits of rice.
• Flies don't have teeth. Instead, they have a long tongue called a proboscis /proʊˈbɑːsɪs/喙, which sucks up food like a straw. Some flies drink nectar or blood. House flies like the food we eat. When a fly lands on your lunch, it vomits /ˈvɑːmɪt/ 呕吐 on the food. Acids in the vomit dissolve the food so the fly can suck it up. Disgusting!
  
• Flies like to eat manure /məˈnʊr/粪肥 , which is animal poop, or old garbage. Some of the germs from these materials can stay on their feet or mouth parts. When a fly lands on your food, those germs get on your food. Super disgusting!
  
• Flies carry disease. During the Spanish-American War, 5,000 soldiers died from typhoid, a disease spread by flies. Only 4,000 soldiers actually died in the war.
  

(2) Housefly

House flies are the most famous of 300 000 species of flies. They can be found all over the world. Human flies developed 65 million years ago. They can survive in all habitats where people can survive, because they are accustomed to the life near humans. Human flies are pests because they easily reproduce and transmit numerous diseases. People apply various insecticides to eradicate them, but they are still very numerous and even resistant to some of those chemicals. On the other hand, house flies are beneficial because they accelerate recycling process by decomposing organic waste.

1) Interesting House fly Facts:

• House fly is small insect that can reach ¼ of inch in length.
  
• House fly is grey in color. It has four dark stripes on the back side of the body.
  
• Unlike other insects, house fly has only one pair of membranous wings. Second pair of wings is reduced and looks like a pair of miniature drumsticks. This pair of wings (known as "halters") is used for balancing during the flight.
  
• House flies are able to move their wings 200 times per second.
  
• House fly can fly at the speed of 5 miles per hour.
  
• House fly produces sticky substance which keeps the fly firmly attached to the ground (it acts like glue after landing).
  
• House fly has red compound eyes. Each eye contains 4000 lenses that enable visualization of different pictures at the same time. Despite huge number of lenses, house fly has poor eyesight.
  
• House fly relies mostly on the sense of smell when it searches for food. Sense of smell is located in the antennas.
  
• House fly eats sugary liquids and different kinds of organic waste. All food needs to be turned into liquid before ingestion because fly does not have teeth and ability to chew food. House fly spits digestive juices on the food to decompose it before swallowing.
  
• House flies are carriers of numerous pathogenic /ˌpæθəˈdʒenɪk/致病的 bacteria. Gangrene /ˈɡæŋɡriːn/坏疽 , tuberculosis/tuːˌbɜːrkjəˈloʊsɪs/结核病 , dysentery /ˈdɪsənteri/ 痢疾, anthrax/ˈænθræks/炭疽热 , plague/pleɪɡ/瘟疫 and different types of poisoning are just some of diseases transmitted by flies.
  
• House flies defecate /ˈdefəkeɪt/排便 every couple of minutes. This is one of the factors that facilitate transmission of diseases.
  
• House flies are active during the day. They rest during the night.
  
• Females can lay up to 2500 eggs usually on the food they eat.
  
• House flies have incredible high reproductive capacity. Without natural predators, one couple of flies and their offspring would be able to cover all continents on Earth to the height of 18 feet after couple of months of reproduction.
  
• House fly can survive from 30 to 60 days.

2) The lifecycle of a housefly
A basic cycle begins with an egg,then develops through a larva phase,a pupa phase,and finally, into an adult. During a warm summer--optimal conditions for a housefly--the cycle,from fertilized egg to adult, spans a mere seven to 10 days.

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Question: Do all flies drink blood?
Answer: Only a few, such as horseflies and mosquitoes, drink blood. Only the females drink blood. They need the extra nutrients to lay eggs. Males drink nectar.
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Question: How many germs can flies carry?
Answer: Scientists have estimated that flies can carry almost 2 million types of bacteria. Gross!

3) How to get rid of houseflies?

• Keep you homes clean.
  
• Remove trash regularly and seal your garbage cans.
  
• Clean up pet waste immediately.
  
• Use fine mesh screens on doors and s to prevent flies from getting into your home.
  
• UV fly electric traps
  
• Use chemical fly sprays
  
• Electronic handheld flyswatter s are also called fly bats
  
• Fresh orange peel
  

(3) How do insects mouths work?

Basically, insects have three different types of mouths:

• chewing (think ants, caterpillars, crickets);
  
• sponge (fly is the primary example I can think of);
• sucking (butterfly, mosquito).

Mandibles /ˈmændɪbl/: These are hard jaws meant for gripping and biting, most often found on insects like ants.

Maxillae/mækˈsɪlə/: Secondary jaws, usually past the primary jaws for further destruction of the prey.

Labrum /'lebrəm/上唇： The upper lip of the mouth, commonly found in insects such as caterpillars and butterflies.

Labium/'leɪbɪəm/下唇： The lower lip of the mouth, again, commonly found in caterpillars and butterflies.

• Caterpillars, grasshoppers,ants and praying mantis， mouths are like pliers.They use their pliers to hold the food.
  
• A mosquito's mouth is like a syringe.hey pierce the hosts' skin to consume blood. They pierce the hosts' skin to consume blood.
  
• Bees and butterflies mouths are like a straw, They suck to eat.
  
• Flies mouths are like a sponge, it secrete saliva over their food, dissolving the food source which can later be sucked up through their straw-like mouth.
  

4. Experiment

1) What You Will Need
• Pictures of the mouths of an ant, bee, and fly
• Empty juice container, cereal box
• Tweezer
• Straw
• Sponge
2) What To Do
Display the pictures of the insects' mouths. Explain the different insect mouths and the different ways insects draw food into their mouths.
Display the various tools (tweezers, straws, sponges) and discuss how the tools are similar to the insects’ mouths. Match each tool to each type of insect mouth.
Allow the children to try using tweezers, sponges, and straws to move the materials into their insect's stomach (bowl).
3) Discussing
• Which tool works like the mouth of an ant? Why?
• Which tool works most like the mouth of a fly? Why?
• Describe how a bee uses its mouth to eat.
• Explain how the way insects eat is different from the way you eat.
• Which tool worked best with each of the foods? 难度系数增加后，老母亲陪玩过程会偶尔掉线，不得不承认业务还是不熟练，回炉改造，认真学习。