Đặt một vật sáng ab vuông góc vs thấu kính hội có tiêu cự20cm thu được ảnh thật a'b' cao 3cm vuông góc vs trục chính và cách kính 60cm

A, hãy ve hình va xác dinh vị trí vật ab theo đúng tỉ lệ

B, tính vị trí và độ lớn của ab

Giải thích gium mik tại s lại chọn câu a

A, advise

B, promise

C, release

Tense

If you want to exchange goods, you will needed to procedure a....... ( receive)

If things go wrong, you don't be....... ( encourage)

She is extremely....... Sales representative ( persuasion)

No One can deny them..... of his contribution (precious)

We asked her to take part in but she made no...... to us(rrspond)

Please don't shout. It is rather...... (polite)

If you want to stay......., you should take plenty of exercise (health)

You 've got enough to do. I (do)..... The shopping

When john finishes university he(work).....abiroad for a cup of years .at least that's his plan

We have to go to bed early (allow )

We.....

These were the day......we were very happy

(that/of which /about which /when)

It was not ......to finish that work befo5'oclock

A, expected

B, expecting

C, expectative

D, expectation

Why don't we take lisa.....with us on our next

( on, in, along)