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搜题
【单选题】
无符号整数是计算机中最常使用的一种数据模型,其长度(位数)决定了可以表示的正整数的范围。假设无符号整数的长度为12位,那么它可以表示正整数的最大值(十进制)是
A.
2048
B.
4096
C.
2047
D.
4095
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【简答题】mitosis
【单选题】直接发自腹主动脉,分布至腹腔内成对脏器的动脉是
A.
腹腔干
B.
肠系膜上动脉
C.
肠系膜下动脉
D.
肾上腺中动脉
E.
隔下动脉
【判断题】诗学始终在关注作者和个人。
A.
正确
B.
错误
【单选题】胆囊动脉发自()
A.
腹主动脉
B.
腹腔干
C.
肠系膜上动脉
D.
肠系膜下动脉
E.
肝右动脉
【单选题】当用氢氟酸挥发硅时,应在( )器皿中进行。
A.
玻璃
B.
石 英
C.
金属
D.
氟塑料
【单选题】一个进程执行过程中不可能对应()。
A.
一个PBC
B.
一个JCB
C.
多个PCB
D.
一个程序
【单选题】一个进程执行过程中不能可能对应( )。
A.
一个PCB
B.
一个JCB
C.
多个PCB
D.
一个程序
【简答题】Mitosis
【单选题】如果一个程序为多个进程所共享,那么该进程的代码在执行的过程中不能被修改,即程序应该是()
A.
可执行码
B.
可重入代码
C.
可改变码
D.
可再现码
【多选题】How do different cytoskeletal assemblies carry out mitosis and cytokinesis?
A.
After the duplicated chromosomes have condensed, a pair of complex cytoskeletal machines assemble in sequence to carry out the two mechanical processes that occur in M phase.
B.
The mitotic spindle carries out nuclear division (mitosis), and, in animal cells and many unicellular eukaryotes, the contractile ring carries out cytoplasmic division (cytokinesis). Both structures disassemble rapidly after they have performed their tasks.
C.
The mitotic spindle is composed of microtubules and the various proteins that interact with them, including microtubule-associated motor proteins. In all eukaryotic cells, the mitotic spindle is responsible for separating the duplicated chromosomes and allocating one copy of each chromosome to each daughter cell.
D.
The contractile ring consists mainly of actin and myosin filaments arranged in a ring around the equator of the cell. It starts to assemble just beneath the plasma membrane toward the end of mitosis. As the ring contracts, it pulls the membrane inward, thereby dividing the cell in two. We discuss later how plant cells, which have a cell wall to contend with, divide their cytoplasm by a very different mechanism.
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