đặc điểm của cơ quan sinh dưỡng của cây thông thích nghi với đời sống hoàn toàn ở cạn?

Em hãy trình bày cơ quan sinh dưỡng và cơ quan sinh sản của cây dương xỉ.

a,Từ 140-400 có bn số chia hết cho 7?
b,Hãy tính tổng của chúng?
2.Cho dãy số:13,19,25....
a,Hẫy tìm số hạng thứ 30 của dãy
b,tính tổng của 30 số hạng trên
3,Tìm x thuộc N
a,157-9.(7.x+3)=69

b,2x+4x+6x+....+100.x=7650

1.Yesterdatthey(go)______home after they (finish)___________their work
2.When we came to the stadium,the match (already start)_________
3.Many people(move)______to the new place before the storm occurred
4.I sat down ant rested after they(go)_______
5.Before he died,he (be)___________ill for several days
6.Last night before he (watch)___________TV,he(do)___________the exercise
7.By the time the police arrived,the house(be)_____________burned down
8.By last year,twenty schools in this province(be)___________built

Exercise:Make questions for the underlined part
1.The dog frightened the little girl
2.The film made us moved
3.The truth made her dissapointed
4.The song reminded me of my ex-girlfriend
5.His watch tells the time precisely
6.Her dog keeps her amused
7.The exam result made her sad
8.The washing and the washing up make her tired
9.Fried chicken appeals to my sister a lot
Exercise:Make questions for the underlined part
1.They danced beautifully
2.John talked very tactfully
3.He ran very fats
4.Mr Brown looked at the picture attentively
Exercise
1.This car is my father
2.This is her cat
3.It's their house
4.This easy is Peter's

1.I(get)_________up early the day before yesterday. 2.The earth(circle)_____the sun once every 365 days. 3.Rivers usually(flow)______to the sea. 4. Do you know that man ,who(smoke)_____there. 5.We(be)______from French.We(be)_______there for 20 years. 6. I(move)_______ to another town next week. 7.I(see)_______that film several times because I like it. 8.She always(go)_________go to bed before her mother does. 9.Mary(lose)________her hat for 2 days. 10.______you(take)______\_ a trip to London next week. 11.She rarely(take)________ a bath before dinner. 12.He(not finish)________ doing it yet. He(not see)_______him since Christmas.

The present perfect or the simple past tense. 1.How long ago he(start)______to learn French? 2.She(lose)_____her handbag on the train yesterday morning. 3. His dog(just run)___________out of the garden. 4.Mr.Brown(travel)________by air several times in the past. 5.He(travel)_________ to Mexico by air last summer. 6.We seldom (eat)________before 7am. 7.I(not see)________hom since I (meet)______him 2 months ago. 8.Listen! I (think)___________someone(knock)______the door.

1.Cho 4 chữ số 0;1;2;5 hãy ghép thành những số có 3 chữ số khác nhau và chia hết cho 5. 2.Viết các số sau thành số La Mã. 444. 888. 759. 1975. b,Viết kết quả các phép tính sau bằng số la Mã. CCCLXXV+XCVII=. MMMCDLI:XVII