Trong không gian với hệ tọa độ Oxyz, cho mặt phẳng (P): 2x - 3y + 5 = 0 Vectơ nào dưới đây là một vectơ pháp tuyến của (P)

A.  n 1 → = ( 2 ; - 3 ; 4 )

B.  n 2 → = ( 2 ; 3 ; 4 )

C.  n 3 → = ( 2 ; 4 ; 5 )

D.  n 4 → = ( 2 ; - 3 ; - 5 )

Read the text and choose the correct answer A, B, C or D for each of the gaps.

    After a tour in Cu Chi, we are moving to Mot Thoang Vietnam craft village (16) ______ at Phu Binh Village, Ho Chi Minh City. Arriving atMot Thoang Vietnam, we observe on-the-spot (17) ______craft persons weave tho cam (ethnic brocade fiber), (18) ______wooden logs into wonders and weave rattan into home appliances. Mot Thoang Vietnam can (19) ______your need to know what many of Vietnam's traditional craft villages are like. The quarter of craft villages at Mot Thoang Vietnam is quiet, but not boring (20) ______craft persons chat amidst the clacking sound of wooden cudgels hitting a chisel caused by a sculptor or a (21) ______used for weaving cloth. Sitting a little far from the sculptor and the weaver (22) ______ the craftsmen and women in their simple but unique attire making giay gio (poonah paper) and inlaid gold-leaf items, doing the (23) ______and the farming. We enjoy a traditional Vietnamese lunch at the village. After lunch, more walking to the traditional house of Vietnam from South to North with different (24) ______. Watching a traditional dance show by the (25) ______people.

Question 23:

A. ironing

B. exercise

C. research

D. embroidery

Read the text and choose the correct answer A, B, C or D for each of the gaps.

    After a tour in Cu Chi, we are moving to Mot Thoang Vietnam craft village (16) ______ at Phu Binh Village, Ho Chi Minh City. Arriving atMot Thoang Vietnam, we observe on-the-spot (17) ______craft persons weave tho cam (ethnic brocade fiber), (18) ______wooden logs into wonders and weave rattan into home appliances. Mot Thoang Vietnam can (19) ______your need to know what many of Vietnam's traditional craft villages are like. The quarter of craft villages at Mot Thoang Vietnam is quiet, but not boring (20) ______craft persons chat amidst the clacking sound of wooden cudgels hitting a chisel caused by a sculptor or a (21) ______used for weaving cloth. Sitting a little far from the sculptor and the weaver (22) ______ the craftsmen and women in their simple but unique attire making giay gio (poonah paper) and inlaid gold-leaf items, doing the (23) ______and the farming. We enjoy a traditional Vietnamese lunch at the village. After lunch, more walking to the traditional house of Vietnam from South to North with different (24) ______. Watching a traditional dance show by the (25) ______people.

Question 21:

A. chair

B. table

C. loom

D. lamp