Заполните пропуск Our planet is in grave danger _______ human activity.: ответ на тест 119217 - Английский язык

Заполните пропуск
Our planet is in grave danger _______ human activity.

Заполните пропуск
Our planet is in grave danger _____ human activity.

Определите, является ли утверждение:

Silicon is the main material for solar cell fabrication.

Определите, является ли утверждение "Solar radiation instruments measure the spectral range of radiation, including global solar radiation." 

Расположите пропущенные предложения в таком порядке, чтобы получился связный текст
Medical technology applies engineering principles to the fields of biology and medicine, for example in the development of aids or replacements for defective or missing body parts. 1 _______.
Ultracane, as the name suggests, uses ultrasound (sound above the level of human hearing) to help blind people detect obstacles around them so that they can walk with more confidence. 2 _______. (Finding your location, as bats do, echoes from sound waves is called echolocation.) 3 _______. Robot surgeons are also used for keyhole surgery. 4 _______.

Определите, к какому виду делового документа относится представленный ниже отрывок