So sánh số lượng đồng phân của anken C4H8 và C4H10? Giải thích

Giúp mình với ạ bài này mik cần gấp

Câu bị động 1.Mai is watering the flowers in the agrden 2.The teacher is collecting the papers 3.They hang the maps on the wall 4. How many trees did you cut down to build that fence? 5. My mother used to make us clean the house 6. Tom was wiring 2 poems

As scouts, we learn how to......a fire and to find ways in the forest. A: set up B: bring up C: build D: make up

giúp mik vs ak mình cần gấp lắm cản ơn nhiều

em đang cần gáp ạ giúp em với ọ

Giúp mình vs ạ. Mình gấp lắm. Mình vote 5*

F. WRITING XV Make meaningful sentences based on the given words below. 1. People/very/ willing/ donate/ charity. ...................................................................................................................... 2. Stop/ eat/ sweets/ night/ if/ you/ not/ want/ have/ toothache. ...................................................................................................................... 3. Dave/be/ fond/ skiing/ since/ he/ move/ Australia. ...................................................................................................................... 4. I/ really/ enjoy/ play/ musical instruments/ but/ I/ not/ have/ much/ free-time/ that. ...................................................................................................................... 5. Do/ exercise/every/ day/ very/ effective/ way/ keep fit/avoid/ diseases. ...................................................................................................................... XVI Rewrite the following sentences based on the given words. 1. He is crazy about beach volleyball. → He is........................................................................................... (fan) 2. What she fancy doing is to ride a bicycle around the park in the afternoon. → She is.......................................................................................(keen) 3. My grandfather needs to have a surgery. His heart problem is very serious. → My grandfather...............................................................................(for) 4. Lam has participated in many volunteer campaigns up to now. → Lam............................................................................................... (part) 5. They started to raise funds to help disable children in early 2009. → They...........................................................................................(since)

cho dãy số ( Un) xác định bởi Un+2 = Un+1 - Un ( n>= 1 ,n thuộc N ) biết U1 + U2 +...+ U1972 =250 và U1+ U2 +...+ U1995 = 320 tính S = U1 + U2 + U3 +... + U2012 ai đó giúp mình bài này với,.

Làm giúp mik câu 2 nha~~ Mong mn giúp😫😫