1

Set 5: Central Ideas

Explanation

Answer: A

PASSAGE

The following text describes the International Space Station (ISS). The International Space Station is a modular space station in low Earth orbit. It is a multinational collaborative project involving five space agencies: NASA (USA), Roscosmos (Russia), JAXA (Japan), ESA (Europe), and CSA (Canada). The station serves as a microgravity and space environment research laboratory in which crew members conduct experiments in biology, physics, astronomy, and other fields.

What is the primary purpose of the International Space Station according to the text?

A. To serve as a military base for five nations✓ Correct
B. To function as a research laboratory in space
C. To transport tourists to the moon
D. To monitor weather patterns on Earth

Detailed Explanation

Choice B is correct. The text explicitly states the station 'serves as a microgravity and space environment research laboratory.'

Key Evidence:

• "serves as a ... research laboratory"

• "crew members conduct experiments"

Why others are wrong: A (Inaccurate (collaborative project, not military)), C (Not mentioned), D (Not mentioned).

Next →