Понимание структурно-смысловых связей в тексте

To design spacesuits, vehicles and habitats with enough shielding to keep astronauts safe, scientists need to know A ______. They can estimate this radiation dose using computer models, but a computer model and real-life can be two wildly differ- ent things. Until now, researchers weren’t sure B ______.

That’s where the Phantom Torso comes in. He’s an armless, legless, human-shaped mannequin C ______. Scientists call him Matryoshka, and like his NASA counterpart Fred, this mannequin is an intrepid space traveller.

Matryoshka’s plastic body is loaded with over 400 dosimeter sensors D ______. The sensors are placed in the location of vital human organs. All the data collected is being used by scientists to verify the accuracy of computer models used to predict the safety of space missions for human astronauts.

The Phantom Torso has become a regular sight on the International Space Station over the last four months but now the limbless mummy-like humanoid is back home again. The Phantom Torso has provided the real-world test needed to prove E ______. They’re accurate to within ten percent of the measured dose. That means these models can be used to plan NASA’s return to the Moon or even a trip to Mars.

Lessons learned from Fred and Matryoshka have major implications for NASA’s plans to set up a manned outpost on the Moon and eventually to send people to Mars. Protecting astronauts from the harmful effects of space radiation will be a critical challenge for these extended missions.

Now that the Phantom Torso has spent four months on the International Space Station, scientists are learning about the space radiation F ______. The results obtained from this experiment could help in the development of countermeasures to the effect of cosmic radiation experienced by astronauts.

1. that Matryoshka endured
2. how much radiation astronauts actually absorb
3. which collect data from galactic cosmic rays and other radiation sources in space
4. whether their models accurately predicted the radiation dose astronauts experience in space
5. that looks like he’s wrapped in a mummy’s bandages
6. what to do with him
7. that the models used by scientists are essentially correct