A Observations supported by cutting - edge technology can offer long - term record for the study of galaxies. B Scientists' research on the formation and evolution of the universe only stays on the surface. C Scale and time add the difficulty to study galaxies. D Simulating a single galaxy requires all computers on Earth to work more than hundred years.

A To authentically describe the power of the supercomputer. B To highlight the vastness of the universe. C To more intuitively describe the difficulty of measuring the universe. D To highlight scientists' great efforts to study galaxy.

A because of the hotter gas. B because they gave no given size. C because of the denser dark matter. D because of the lack of other materials.

A The Correlation between Galaxy Growth and Dark Matter. B Certain galaxies might form stars at a high rate. C There were 12 million galaxies spanning from about 400 million years after the Big Bang to present day. D The reason why galaxies cease form new stars. E

A It heavily relies on the international stock prices. B It gains in value against other major currencies. C It promotes Japan's economic competitiveness. D It drops in value on foreign exchange markets.

A 12% B 11% C 10% D 9%

A Increasing commodity exports. B Monitoring exchange rates. C Cutting interest rates. D Limiting yen's rise.

A 6764.3 B 7852.9 C 5863.8 D 8423.1

A 42.6 B 49.7 C 38.6 D 52.8

A 只有 (1) 和 (3) B 只有 (2) 和 (3) C 只有 (1) 和 (2) D 只有 (1)、(2) 和 (3)