dat mot cau tn chi muc dich

Mach dien gom 2 bong den mac noi tiep,1 cong tac k, nguon dien 2 pin , mot so day dan a) ve so do mach dien trong do co cuc duong noi voi khoa k.chi chieu dong dien chay trong mach b) neu 3 nguyen nhan ( co the) neu dong khoa den khong sang c) nguoi ta mac them mot mach vao cau chi de bao ve mach dien . Neu nguyen tac hoat dong tac dung cua cau chi trong mach dien

dat 1 cau co cap quan he tu nguyen nhan ket qua noi ve phong tranh xam hai

tim 1 cau co trang ngu chi nguyen nhan

dat mot cau co mot cap quan he tu Vi ...........nen noi ve chi Ut

dat mot cau co su dung dau hai cham  ket hop loi noi truc tiep cua nhan vat

Dat 3 cau ke ai the nao ? co :

a, Chu ngu chi nguoi :

b, Chu ngu chi con vat duoc nhan hoa :

c, Chu ngu chi cay coi hay do vat duoc nhan hoa :

Dat 2 cau ghep 

A, co quan he nguyen nhan - ket qua

B, co quan he gia thiet - ket qua [ hoac  dieu kien - ket qua]

dat 1 cau co cap quan he tu chi nguen nhan krt qua noi ve phong tranh xam hai