user-avatar
ha0976454599
2 năm trước
- ví dụ về âm trầm, bổng là do tần số dao động của vật -ví dụ về độ to của âm -nêu được tiếng vang là một biểu hiện của âm phản xạ -một số ứng dụng liên quan tới sự phản xạ âm
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

On tap 1!HK Lớp 7. irge bookshclves. On these stelves are books of varnous subjectg and newspapers ond nmagazinc here arc also reference books and dictionarics for diliercnt languagcs. The library opens at scve clock in the morning and closes at 4 in the aflernoon. It opens from Monday through Ftiday. I like gomg there to read in my iree tume. 1.is the school library large or smal? ....................................................................... 2.How many librarians are there in the library? ........................................................... 3.What time does it open? ........................................................ 4.11ow many days a weck is it open? . *****"**************************** ************************************* ****apous** -**aeym*mewewbe 11.Rcad thie passage then tick True (T) or Faise (F) Tam and An lve in the same ncighborhood and go to lhe same school. They arc aiso n the same class, but they are difterent in character. Tam likes studying. He always goes to schoot on lime a does his homework. Unlike Tam, An is very lary. He usualy goes to school late. He never docs homework. ARer schuol, he ollen watches TV or listens to music. 1.am and An are dilerent in chatacter. ************ 2.1am likes sports. Ile always plays soctcr. ********************** 3.An is a lazy person. 4.An never docs his honework. *************** ******* - ********** I.Rewrile he toilowing sentences *********.**. Ll. Write a paragropi (about S0 70 words) about y0ur aclivities aller school. * ******************** r****r* *************************************************"*T**t********************************************* ******nwa*pusa t=has*paas a **i*vahse ***************************************************************** ******** *************************** **** **************** ** **s***ik*sdpakm*****h*a********************************i*aa************* *ath* *******"**** ******* ** ************************** *****a4a *** * ******1***d*********a***"******** * **********"***************** ***"**********A**********=-*****dwmme *gagpaasdswere41h PARTESPEARING Topic 1: Talk ahout your favorite subject. Topic 2: Talk abeut your free time | Topic 3: Talk abou you and your tamily Topic 4: Your hobby Topic 5: Your best friend Topic 6: What do you do at recess? Topic 7: How do you study English?

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team