1) Pit tong dong co 2 ki khac 4 ki o diem nao

A. Pit tong dong co 2 ki dai hon

B. Pit tong dong co 2 ki it Xec mang

C. Pit tong dong co 2 ki khong co Xec mang

D. Pit tong dong co 2 ki khong co Xec mang dau

1) So luong Xec mang tren pit tong phu thuoc vao

A. Khe ho giua pit tong va xi lanh            B. Tat ca cac y tren

C. Do dai phan dau pit tong                     D. Loai dong co va cong suat dong co

1) Co cau phan phoi khi dung xupap khong co tren dong co nao

A. Dong co diezen        B. dong co 4 ki              C. Dong co xang       D. dong co 2 ki

co 100 diem voi bat ki diem khong lien ket, ve tat ca cac dong di qua 2 diem bat ki cua cac diem. Hoi co bao nhieu dong dang co

1) Tong so xupap trong 1 xilanh o dong co xang 2 ki 3 cua khi la:

A. 0                B. 4           C. 1    D.2

Tren bang co giao viet tong 1+2+3+...+2017.co giao cho cac ban thuc hien xoa so hang bat ki cua tong roi thay bang so doi cua no. Hoi sau nhieu lan lam vaythi co luc nao tong bang 1000 hay khong

co 105 kg gao , nguoi ta dong vao 12 bao, moi bao 8 kg. hoi con lai bao nhieu ki lo gam gao chua dong bao

lam bai giai co tu nao khong hieeu bao to phan mem cua to khong co dau

Ba tam vai theo thu tu co gia 120000 dong, 192000 dong, 144000 dong. Tam thu nhat va tam thu 2 co cung chieu dai, tam thu 2 va tam thu 3 co cung chieu rong. Tong ba chieu dai la 110m, tong ba chieu rong la 2,1m. Tinh kich thuoc cua moi tam vai, biet rang gia 1m vuong ( 1m^2 ) cua 3 tam vai bang nhau.

cho 2006 duong thang trong do bat ki 2 duong thang nao cung cat nhau . khong co ba duong thang nao dong qui. tinh so giao diem cua chung.