Mark the letter A, B, C or D on your answer sheet to indicate the sentences that is closest in meaning to each of the following question.

They spent more maney. They had to work harder.

A. The more they spent money, the harder work they had.

B. The more money they spent, the more harder they had to work.

C. The more they spent money, the more hard work they had to work.

D. The more money they spent, the harder they had to work.

n=V/22,4

trong đó:n là số mol , V là thể tích ở điều kiện tiêu chuẩn

a/Theo hình vẽ ta có

\(\left\{{}\begin{matrix}AB\perp m\\AB\perp n\end{matrix}\right.\)

=>m//n

Vậy m//n

b/Ta có

m//n(cmt)

=>\(\widehat{ADC}\)+\(\widehat{DCB}\)=\(180^0\)

=>\(110^0\)+\(\widehat{DCB}\)=\(180^0\)

=>\(\widehat{DCB}\)=\(70^0\)

Vậy \(\widehat{DCB}\)=\(70^0\)