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【多选题】
The development trend in structural design of aircraft includes: ____.
A.
From isotropic structure to anisotropic structure
B.
From metals to nonmetals
C.
From structural weldments to integral parts
D.
From common structure to intelt material structure
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【多选题】The methods for space probe detect planets include: ____.
A.
Probe by orbiting
B.
Sampling and return
C.
Close observation by passing close
D.
On-site investigations
【单选题】Which one belongs to the payload of the "Chang'e-1"? ____.
A.
Star sensors
B.
Imaging spectrometer
C.
Attitude control engines
D.
Solar panels
【单选题】The core module of manned spacecraft is ____.
A.
The experiment module
B.
The orbital module
C.
The re-entry module
D.
The service module
【多选题】A spacecraft generally consists of several parts such as: ____.
A.
The re-entry module
B.
The orbital module
C.
The living module
D.
The service module