Category: 1. Common Subject

In air-quality terms, PM10 mainly includes particles that are A Up to 10µm B Only invisible gases C Only water

In AQI terms, PM2.5 mainly refers to particles that are A Smaller than 2.5µm B Larger than 10µm C Only

A hazard warning is issued, but people do not evacuate because they think “nothing happened last time”; the main failure

A cyclone hits two coastal blocks with similar wind speed; Block X reports far fewer deaths because most families evacuated

A strong earthquake occurs in an uninhabited desert and causes no disruption; this event is best called a A Disaster

A hill village notices new cracks on a road-cut slope after days of rain; the most likely immediate danger is

A coastal town faces cyclone hazard yearly, but disasters reduced after shelters and drills; this shows risk fell mainly due

A hazard may not become a disaster if the area has low exposure and strong A Rumor spreading B Media

A hazard becomes a disaster when serious losses occur and the affected area needs A Only local routine help B

Landslide risk increases sharply when a steep slope has loose soil and A Heavy continuous rain B Strong root cover