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初二教案 第733期
发布时间:2021-04-12

34/733期初二教案

Annie Zhen

 

Suez Canal gives us a shortcut (P4-5)

 

 

I. Pre-reading 

· Where is the Suez Canal located?

  The Suez Canal is an man-made waterway in Egypt extending from Port Said to Suez and connecting the Mediterranean Sea with the Red Sea.

 

II. While reading 

· When did the Suez Canal open?

 

· shortcut: a quicker way to get somewhere or achieve something than the usual route or method.

There is no shortcut to learning English.

 

· What are some key facts about the canal that you can get from this paragraph?

 

· Why is the Suez Canal so important?

 

· ship v. to send or transport sb/sth by ship or another means of transport

 

· a shortage of sth: Africa is suffering from food shortages.

 

· What do the figures in the paragraph indicate?

 

get/become/be stuck/caught/trapped in...

keep .….. doing;

  keep/prevent/stop ...... from doing sth

 

· What are some measures that can be taken to avoid future accidents like this in the Suez Canal?

 

III. Further reading

New possible shipping routes

China-Europe freight train 中欧货运列车

       Since March 2011, China has launched (开通) freight train services in over 60 cities, connecting them with major European countries. The trains made 12,400 trips in 2020, sending medical supplies (物资) and other goods to many countries, according to Xinhua.

 

· What is the strategic significance of the China-Europe freight train?

  Shipping companies don’t have to worry about the disruption of maritime traffic.

 

Arctic shipping routes 北极航线

       Because of global warming, ice is melting (融化) around the Arctic. If this goes on, parts of the Arctic could be used for shipping goods during summer months. One possible route is the Northern Sea Route, which passes over Russia.

 

· What makes Arctic shipping routes possible?

  Because of global warming, ice is melting around the Arctic.

 

How big is the ship?

       The Ever Given is a huge 220,000-ton cargo ship (货船). The ship is 400 meters long and 59 meters wide. If you have no idea how big that is, think about it like this: the Empire State Building is 381 meters tall at its highest floor. So it’s like someone laying out the Empire State Building across the Suez Canal. The ship got stuck in the canal’s most narrow (狭窄的) area, which is about 205 to 225 meters wide. That’s just over half as wide as the Ever Given is long.

 

Did you know?

· The Suez Canal is 193.3 km long. It took 10 years to build.

· Egypt manages the canal. In 2015, it finished an expansion (扩建) of the canal, making it able to hold the world’s largest ships.

· The Suez Canal was closed from 1967 to 1975 because of war.  

 

IV. Post reading

Group discussion – What is the strategic and economic importance of the Suez Canal? How can people develop their own routes to ship goods to other parts of the world?

 

 

 

 

 

 

So cold that it hurts (P6)

 

I. Pre-reading 

· What do you know about teeth?

  We grow two sets of teeth in our lives - primary teeth and permanent teeth.

 

  We get our primary teeth, also known as baby teeth, sometime between the ages of 6 months and 3 years old. After we lose our primary teeth, we get our permanent teeth between the ages of 6 and 11 years old.

 

· Toothache?

  Toothache refers to pain in and around the teeth and jaws that's usually caused by tooth decay. You can feel toothaches in many ways. They can come and go or be constant. Eating or drinking can make the pain worse, particularly if the food or drink is hot or cold.

 

 

 

II. While reading 

· at play 在起作用,在作祟

  There were other factors at play.

  This is greed at play.

 

· Why do cold food and drinks make our teeth hurt?

 

· What do we know about TRPC5?

 

· Why are people with tooth decay more sensitive to cold food?

 

· How does clove oil work?

A. It stops TRPC5 from sending information to our brains.

B. It stops TRPC5 from feeling temperature changes.

C. It has a chemical that can kill TRPC5.

D. It can help decayed teeth recover.

 

· What is the meaning of the study?

A. It teaches us how to protect our teeth.

B. It tells us that cold food is bad for our teeth.

C. It explains what causes tooth pain.

D. It might help us stop toothaches.

 

III. Further reading

Keep your teeth healthy

       When cold makes your teeth hurt, it means that your tooth enamel (牙釉质), where the TRPC5 is, might have worn away (磨损). Here are ways to protect your enamel:

· Don’t brush your teeth too hard. Side-to-side brushing can make your enamel disappear faster. Brush up and down to keep the enamel clean and strong.

· Say goodbye to soda and sticky (粘的) candy.

· Stop grinding () your teeth. Teeth grinding wears away your enamel. Try to relax to stop the problem. If that doesn’t work, go to the dentist.    

 

10 tips to protect your tooth enamel

 

 

How can I protect my enamel?

 

Because it can’t be replaced, your best option is to do what you can to prevent tooth enamel loss.

 

Good dental care is the best way to keep your mouth healthy.

 

Cut down on acidic drinks and foods like soda, citrus fruits, and juices. When you do drink something acidic, have it at meal times to make it easier on your enamel. You can also switch to things like low-acid orange juice.

Rinse your mouth with water right after you eat or drink something acidic.

Use a straw for sodas and fruit juices so they bypass the teeth. Don’t swish them around in your mouth.

Finish a meal with a glass of milk or a piece of cheese. This will cancel out acids.

Chew sugar-free gum. This lowers the amount of acid in your mouth. Gum also helps you make more saliva, which strengthens your teeth with key minerals.

Drink more water during the day if you have dry mouth.

Use a soft toothbrush. Try not to brush too hard.

Wait at least an hour to brush after you’ve had acidic foods or drinks. They soften the enamel and make it more prone to damage from your toothbrush.

Use fluoride toothpaste and mouthwash. Your dentist can tell you which products can protect your teeth and make them less sensitive.

Get treatment for conditions like bulimia, alcoholism, or GERD.

 

IV. Post reading

Group work: What is the proper brushing technique?

           Demonstrate the right way to brush teeth!

 

 


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