L1：

Lecture 1

第一题

What does the professor mainly discuss?

AThe physical characteristics of Earth’s curst

BThe chemical composition of Earth’s core

CEfforts to study conditions in Earth’s interior

DRecently discovered similarities between Earth’s crust and interior

第二题

What does the professor imply about the traditional model of Earth’s layers?

AIt is based on complex structures that may not really exist.

BIt is an oversimplification of Earth’s actual structure.

CIt has been supported by recent laboratory experiments.

DIt is being misinterpreted by many researchers.

第三题

Why does the professor discuss an experiment with water?

ATo show how liquids change when they are heated

BTo demonstrate that water is an unusual substance

CTo point out a disadvantage of relying on high-pressure physics

DTo illustrate an interesting finding from high-pressure physics

第四题

What does the professor say about a diamond-anvil cell?

AIt heats substances by compressing them.

BIt concentrates pressure in a small area.

CIt creates a powerful electromagnetic field.

DIt is used for drilling deep underground.

第五题

What does the professor imply about a very dense mineral detected deep in Earth’s mantle? AIt has the same structure as a crystal created in the laboratory.

BIts molecular structure frequently changes.

CIt is probably harder than a diamond.

DIt will be extracted from deep mines someday.

第六题

What does the professor say geologists were able to determine in 2007?

AThe range of temperatures present on Earth’s curst

BThe speed at which seismic waves travel in Earth’s mantle

CThe distance between Earth’s surface and core

DThe temperature of Earth’s core-mantle boundary