Nồng độ dung dịch 8% cho biết gì?

Read the text/passage carefully then answer the questions below. 

Last weekend, Peter had a day trip to the countryside with some of his classmates. They went to visit Uncle Tom’s farm. They left early in the morning and went there by bus . Uncle Tom and some workers met them at the bus stop and took them to their farm. On the way, Uncle Tom showed them fields of corn and vegetables. After lunch they went for a walk round the farm. In the afternoon they went to the cattle farm. A lot of horses, cows, buffaloes, sheeps were raised here. They saw a new-born calf in the cowshed when they helped the farmers to feed the cows. After having some tea and cakes they said goodbye and went home. It was an enjoyable day!

Questions:

1. When did Peter and his classmates go to visit Uncle Tom’s farm?→………………………………………………………………………………………………..

2. What did they do in the afternoon?→………………………………………………………………………………………………..

Part 9: Choose the words whose underlined part is pronounced differently from that of the

others in each group                   

1. A. poison           B. visual            C. measure             D. pleasure

2. A. thermal         B. litter              C. permanent          D. service

3. A. affect            B. cholera          C. pollutant            D. radiation

4. A. passed           B. watched        C. played                D. washed

Part 8: Choose the word which has different stress pattern from the others.

1. A. athletic           B. historic       C. dramatic                 D. scientific

2. A. medical          B. national      C. chemical                D. informal

3. A. economic       B. artistic        C. politic                    D. electric

4. A. botanical        B. physical     C. environmental        D. historical

Viết chương trình tính tích: 

P=1/1×1/2×1/3×....×1/N

Cho △ABC và M,N lần lượt là trung điểm AB,AC. I là trung điểm của AN. Trên tia MI lấy D sao cho ID=IM.
a) Chứng minh AD=1/2BC, AD//BC.
b) Cho góc BAC = 70°; góc ABC- góc ACB= 10°. Tính các góc của tứ giác AMND.

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