Difficulty: Hard
Average Score: 46%
The ISS (International Space Station), on the other hand, is designed to be a permanent orbiting research facility. Its major purpose is to perform world-class science and research that only the microgravity environment can provide. The ISS crew spends their day working on science experiments that require their input. They also monitor experiments that are controlled from the ground. These astronauts also take part in medical experiments to determine how well their bodies are adjusting to microgravity for long periods of time.

The author of the passage expresses an opinion about which of the following?

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