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【判断题】
奥运会最有名的格言“更快、更高、更强”的“发明者”是顾拜旦。
A.
正确
B.
错误
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参考答案:
举一反三
【简答题】求1-100之间不能被3整除的整数的和 var s = 0; for(var i = 0; i < 100; i++){ if( (1) ){ (2) ; } s +=i; } console.log(s);
【简答题】维生素B2缺乏的典型症状包括( )。
【判断题】美术的基本特征是 具象形象
A.
正确
B.
错误
【多选题】What are the functions of cilia?
A.
Many microtubules in cells are stabilized through their association with other proteins and therefore do not show dynamic instability. Cells use such stable microtubules as stiff supports in the construction of a variety of polarized structures, including motile cilia and flagella.
B.
Cilia are hairlike structures about 0.25 μm in diameter, covered by plasma membrane, that extend from the surface of many kinds of eukaryotic cells. Each cilium contains a core of stable microtubules, arranged in a bundle, that grow from a cytoplasmic basal body, which serves as an organizing center.
C.
Motile cilia beat in a whiplike fashion, either to move fluid over the surface of a cell or to propel single cells through a fluid. Some protozoa, for example, use cilia to collect food particles, and others use them for locomotion. On the epithelial cells lining the human respiratory tract , huge numbers of beating cilia (more than a billion per square centimeter) sweep layers of mucus containing trapped dust particles and dead cells up toward the throat, to be swallowed and eventually eliminated from the body.
D.
Similarly, beating cilia on the cells of the oviduct wall create a current that helps to carry eggs away from the ovary. Each cilium acts as a small oar, moving in a repeated cycle that generates the movement of fluid over the cell surface.
【单选题】甲、乙、丙三辆车的时速分别为60公里、50公里和40公里,甲从A地、乙和丙从B地同时出发相向而行,途中甲遇到乙后15分钟又遇到丙,问A、B两地相距多少公里?
A.
150公里
B.
250公里
C.
275公里
D.
325公里
【单选题】必须设立电路参考点后才能求解电路的方法是 ( )
A.
支路电流法
B.
回路电流法
C.
网孔电流法
D.
节点电压法
【单选题】粉体密度的大小顺序正确的是:
A.
松密度>粒密度>真密度
B.
粒密度>真密度>松密度
C.
松密度>真密度>粒密度
D.
真密度>粒密度>松密度
E.
真密度>松密度>粒密度
【简答题】有甲、乙、丙三个数,已知甲、乙;乙、丙;丙、甲两数的平均数分别为40、46、43,那么甲、乙、丙三个数的平均数是______.
【单选题】春秋时期的“侯伯”指的是()。
A.
诸侯之一
B.
诸侯之末
C.
诸侯之长
D.
诸侯之主
【单选题】《铁路路风管理办法》中指出:路风监察人员执行职务时,被检单位要支持配合检查人员工作,并()。
A.
提供方便
B.
提供依据
C.
提供便利
D.
提供条件
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