L3：
Lecture 3
第一题
What is the main purpose of the lecture?
ATo discuss the chemical composition of rock samples from the Moon
BTo challenge a hypothesis about the formation of the Moon
CTo discuss research into the presence of water on the Moon
DTo explain plans for establishing space stations on the Moon
第二题
According to the professor, why are the lunar poles more likely to contain water than the rest of the Moon?
AThe poles are more likely to be hit by comets.
BThere are more volcanic rocks at the poles than elsewhere on the Moon.
CThe temperature at the poles can preserve water in a frozen state.
DThe craters at the poles are the only lunar craters deep enough to hold water.
第三题
What was the purpose of a lunar mission involving a rocket?
ATo analyze the material ejected from a crater
BTo replicate an experiment carried out on another planet
CTo store a large supply of water in a crater
DTo test the capacity of a data-recording spacecraft
第四题
What two unexpected findings related to missions on the Moon does the professor mention? Select 2 answers
ASome hydrogen deposits on the Moon’s surface have boiled off into space.
BThere is water in lunar rocks that were brought to Earth by the Apollo astronauts.
CThe majority of the Moon’s surface is permanently dry.
DLunar craters contain volatile materials that might be usable for fuel.
第五题
Why does the professor discuss deuterium?
ATo explain the location of some planets in the solar system
BTo explain a method of determining the source of lunar water
CTo explain why water from comets might be toxic to humans
DTo explain that lunar water contains more deuterium than the water on Earth
第六题
What is the professor’s opinion of the idea that the Moon’s water originated on Earth?
AIt lacks evidence because the water from rock samples could not be analyzed.
BIt contradicts the standard hypothesis about the Moon’s formation.
CIt makes sense, because Earth’s deserts once contained water.
DIt is attractive, but creates a problem that needs to be solved.
