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【单选题】
Definition of M yosinA.
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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【单选题】以下对心理危机干预描述错误的是
A.
是针对个体或者人群的心理危机而采取的一系列明确有效的措施，以帮助其恢复心理平衡的过程
B.
心理危机干预包括心理辅导、教育、咨询、沟通、心理治疗等活动
C.
心理危机干预时间一般在危机发生后的数个小时、数天、或是数星期
D.
心理危机干预的对象就是针对事件的受害者、幸存者