cho S1=1+-3+5+-7+....+17; S2=-2+4+-6+......+-18 tính S1+ S2

Nowadays, more and more people are changing the (23)___________ They use their televisions. When television was new, we used to turn (24) ________ and watch whatever there was. (25) ___________ for us to think it much be enjoyable. But no that it is part of every life. We choose the program we watch much more carefully. We remember that we have many (26) ________ interesting things to do. As we watch ( 27) _________ program , we want to be sure that we will have a really good picture, with bright colors, and (28) __________ we are really interested, we want really clear sound. Of course, for higher quality, we have to pay more. 23/ A. course B. way C. reason D. cause 24/ A. off B. out C. on D. over 25/ A. enough B. too C. so D. such 26/ A. others B. other C. one D. another 27/ A. less B. little C. fewer D. much 28/ A. in spite of B. though C. because D. because of

Giúp emmmm với ạ Nhanh nhanh nha Làm 1 cái thui cũng được ạ Khongg cần làm hết cả A B Giúp em giải thích tại sao lại điền từ đó với ạ Em xin cảm ơn trước ạ

Vì sao quyền học tập của công dân là vô cùng quan tẹong và cần thiết ? Lấy ví dụ?

Giúp em với ạ Em cần gấp lắm ạaa Em cảm ơn anh chị rất nhiềuuuuu

Giúp mình với ạ mình cần gấp

Giúp mình với mai mình kiểm tra ròi

Cho tia Ox vẽ xOy = 30 độ và xOz = 45 độ trên cùng 1 mặt phẳng có bờ chứa tia Ox Trong ba tia Ox , Oy tia nào nằm giữa hai tia còn lại

giúp mik 2 bài này với mik vần gấp

A volcano is an opening in the earth’s surface through (23)___________ lava, hot, gases and rock fragments erupt. (24) ________ an opening occurs when melted rock from deep within the earth blasts through the surface. Most volcanoes are a top mountains, particularly cone-shaped mountains. The mountains themselves are also called volcanoes. Eruptions of volcanic mountains are spectacular sights. In some eruptions, huge fiery clouds rise over the mountain, and growing rivers of lava flow down (25) _________ sides. In other eruptions, red- hot ash and cinders shoot out the mountaintop, and large chunks of hot rockare blasted (26) ________ into the air. A few eruptions are so ( 27) _________ that they blow the mountain apart. Some eruptions occur on volcanic islands. Such islands are the tops of volcanic mountains that have been built (28) __________ from the ocean floor by repeated eruptions. Other eruptions occur along narrow cracks in the ocean floor. 23/ A. which B. that C. where D. when 24/ A. So B. Such C. That D. Many 25/ A. its B. it C. their D. theirs 26/ A. high B. low C. below D. above 27/ A. gentle B. violent C. terrible D. awful 28/ A. up B. on C. into D. onto