uses crt;

var a:array[1..100]of integer;

i,n,dem:integer;

begin

clrscr;

readln(n);

for i:=1 to n do 

  readln(a[i]);

dem:=0;

for i:=1 to n do 

  if (a[i] mod 2=0) and (i mod 2=1) then dem:=dem+1;

writeln(dem);

readln;

end.

Prepositions – Place (Position and Direction)
Location prepositions are used to her gender from the position of an object or an action is happening in a certain place (location)

Adv of place

inroom, building, street, town, country
book, paper etc.
car, taxi
picture, worldin the kitchen, in London
in the book
in the car, in a taxi
in the picture, in the world

atmeaning next to, by an object
for table
for events
place where you are to do something typical (watch a film, study, work)at the door, at the station
at the table
at a concert, at the party
at the cinema, at school, at work

onattached
for a place with a river
being on a surface
for a certain side (left, right)
for a floor in a house
for public transport
for television, radiothe picture on the wall
London lies on the Thames.
on the table
on the left
on the first floor
on the bus, on a plane
on TV, on the radio

by, next to, besideleft or right of somebody or somethingJane is standing by / next to / beside the car.

underon the ground, lower than (or covered by) something elsethe bag is under the table

belowlower than something else but above groundthe fish are below the surface

overcovered by something else
meaning more than
getting to the other side (also across)
overcoming an obstacleput a jacket over your shirt
over 16 years of age
walk over the bridge
climb over the wall

abovehigher than something else, but not directly over ita path above the lake

acrossgetting to the other side (also over)
getting to the other sidewalk across the bridge
swim across the lake

throughsomething with limits on top, bottom and the sidesdrive through the tunnel

tomovement to person or building
movement to a place or country
for bedgo to the cinema
go to London / Ireland
go to bed

intoenter a room / a buildinggo into the kitchen / the house

towardsmovement in the direction of something (but not directly to it)go 5 steps towards the house

ontomovement to the top of somethingjump onto the table

fromin the sense of where froma flower from the garden

Trạng ngữ là thành phần phụ trong câu, được thêm vào câu để xác định thời gian, nơi chốn, nguyên nhân, cách thức, phương tiện, mục đích diễn ra sự việc nêu trong câu. Nó có thể đứng ở đầu câu, cuối câu hoặc giữa câu. Trạng ngữ có thể được cấu tạo từ một cụm từ hoặc một từ.

Đáp án là C

Chúc bạn học tốt!! ^^

C

CCCCCCCCCCCCCCCC

Vị trí cân bằng là vị trí vật đứng yên, các lực tác dụng lên vật cân bằng nhau.