1.Would you like ..to have....(have) breakfast with eggs , children ?

2.I'd like ....to join........(join) your club

3.I'd like (buy)..to buy......some stamps for overseas mail

Tóm tắt:

\(m_1=0,5\left(kg\right)\\ t_1=80^oC\\ t_2=15^oC\\ t=20^oC\\ c_1=380\dfrac{J}{kg}.K\\ c_2=4200\dfrac{J}{kg}.K\\ ----------------\\ m_2=?\\ \)

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Giaỉ:

Theo PT cân bằng nhiêt, ta có:

\(Q_{thu}=Q_{tỏa}\\ < =>m_2.c_2.\left(t-t_2\right)=m_1.c_1.\left(t_1-t\right)\\ < =>4200m_2.\left(20-15\right)=0,5.380.\left(100-20\right)\\ < =>21000m_2=15200\\ =>m_2=\dfrac{15200}{21000}\approx0,724\left(kg\right)\)

Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.

It is not easy ____ a well-paid job.

A. to find

B. finding

C. finded

D. find