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【单选题】
下列不属于模式生物的特征是()A.
生长周期短
B.
基因组简单，遗传背景清楚
C.
子代多，对环境无害
D.
基因组复杂，比较难研究
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【多选题】For a ceramic compound, what are the characteristics of the component ions that determine the crystal structure?
A.
the magnitude of the electrical charge on each ion
B.
the numer of atoms in ceramic
C.
the relative sizes of the cations and anions
D.
the weight of atoms in ceramic
【多选题】For a ceramic compound, what are the characteristics of the component ions that determine the crystal structure?
A.
the magnitude of the electrical charge on each ion
B.
the number of atoms in ceramic
C.
the relative sizes of the cations and anions
D.
the weight of atoms in ceramic
【单选题】Who wrote Gulliver's Travels?
A.
Lemuel Gulliver
B.
Alexander Pope
C.
Jonathan Swift
D.
Henry Fielding
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