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【单选题】
Definition of I ntermediate Filament ( )A.
It is a major site in which t he γ-tubulin s combine with several other associated proteins to act as a scaffold for α - β tubulin dimers during the nucleation process .
B.
It is a cytoskeletal component composed of a family of related proteins sharing common structural and sequence features , which are cytoplasmic and nuclear localization .
C.
It is composed of a double-helical polymer of the protein actin, and play s a key role in virtually all types of contractility and motility within cells.
D.
It comprise s a superfamily of ATP -dependent motor proteins which are responsible for actin -based motility.
E.
It is composed of three distinct types of fibrous structures: microtubules, intermediate filaments, and microfilaments, which participate in a number of cellular activities.
F.
It is a protein belonging to a class of motor proteins found in eukaryotic cells . Most of them walk towards the positive /minus end of a microtubule .
G.
It is a family of cytoskeletal motor proteins that move toward the microtubules' plus end .
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【简答题】城市郊区和农村的土地除法律规定属于国家所有外，属于（ ）所有。
【简答题】农村和城市郊区的土地，除法律规定属于国家所有的以外，属于谁所有?
【单选题】我国城市市区土地属于__________所有，农村和城市郊区土地除法律规定属于国家所有的以外，属于__________所有。（ ）
A.
工人、农民
B.
国家、农民个人
C.
国家、集体
D.
集体、农民个人
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