I have been digging in the garden since morning. - я копаю в саду с самого утра.
present perfect continuous tense
настоящее совершенное продолженное время
действие длится с самого утра и по сей час
Вопросы
1)<span>Density (specific weight) is the amount of mass in a unit volume.
2)</span>It is measured in kilograms per cubic metre. Aluminium alloys, with typical densities around 2800 kg/m3<span> are considerably less dense than steels.
3)</span>Aluminium-2800 kg/m<span>3
</span>water is 1000 kg/m<span>3
</span>steels-7800 kg/m<span>3
</span>4)<span>Stiffness (rigidity) is a measure of the resistance to deformation such as stretching or bending.
5)</span><span>The Young modulus is a measure of the resistance to simple stretching or compression.
6)</span><span>Strength is the force per unit area (stress) that a material can support without failing.
7)- вопрос не в тему
8)
9)b
10)</span>used for part of the car body
1.she
2. It
3. He
4 she
5 he
6 it
7 it
8 it
9 they
10 they
11they
12 it
13it
Кэп кэн хэнд энд хэз кэйк лейк джейн нейм плейт дейв