НУЖН Подчеркните в каждом из них модальный глагол или его эквивалент.
1). This instrument can be used to measure a number of different electrical quantities, such as voltage, current and resistance.
2). He had to study the theory of interplanetary travel.
3). We can determine the pressure of our atmosphere with the help of a barometer.

etyan00    2   06.06.2020 22:15    7