A . the distance between them remains the same
B . the distance between them is changing
C . the position between them is not changing
D . their positions to the earth remain the same
[单选题]Passage TwoWhen we see well, we do not think about our eyes very often. It is only when we cannot see perfectly that we realize how important our eyes are.People who are nearsighted can only see things that are very close to their eyes. Everything el
[单选题]The number of ways we can choose r objects from a total of n objects, when
[单选题]We don’t have beds in the spacecraft, but we do have sleeping bags. During
[单选题]We don’t have beds in the spacecraft, but we do have sleeping bags. During
[单选题]We don’t have beds in the spacecraft, but we do have sleeping bags. During
[单选题]We don’t have beds in the spacecraft, but we do have sleeping bags. During
[单选题]We don’t have beds in the spacecraft, but we do have sleeping bags. During
[单选题]We are pleased to say that we are()to supply you()the goods you want.A . of a position,──B . at a position,──C . in a position,withD . at a position,with
[单选题]The proposal _____,we’ll have to make another decision about when to start
[单选题]We are pleased to say that weare()to supply you()the goods you want.A . of aposition,──B . at aposition,──C . in aposition,withD . at aposition,with