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【多选题】
阿司匹林用于防治血栓的规格是（ ）A.
25mg
B.
40mg
C.
100mg
D.
300mg
E.
400mg
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【单选题】Which of the following modulations is for the VHF radio telephone?
A.
G3E
B.
F3E
C.
G2B
D.
F1B
【简答题】Which of the following radio installations isnot required by ships when sailing in sea areaA2?A. VHF. B. MF. C. EPIRB. D. HF
【单选题】Which of the following facts from the selection best supports the statement that the radioactive waste is an unsolved problem?
A.
We have already generated over 10,000 tons of nuclear waste.
B.
Radioactivity could be released into the environmental from activities related to mining and processing nuclear fuel.
C.
Only a part of nuclear fuel is fissionable.
D.
A location for stainless steel tanks containing 'high-level liquid waste' mixed with molten glass has not been found.
【简答题】既然生产关系对生产力有反作用，因而变革生产关系就能促进生产力的发展。
【单选题】The following radio communication systems are used in the GMDSS except( )
A.
the Inmarsat system
B.
VHF MF and HF terrestrial systems
C.
the COSPAS-SARSAT system
D.
the FLAG SIGNAL systems
【单选题】Which of the following characteristics of radio galaxies is mentioned in the passage?
A.
They are a type of elliptical galaxy.
B.
They are usually too small to be seen with a telescope.
C.
They are closely related to irregular galaxies.
D.
They are not as bright as spiral galaxies.
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