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【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.
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【单选题】— Look! The young man _____ is in blue looks like Mr. Clark. — I think so. [     ]
A.
what
B.
who
C.
whose
D.
which
【单选题】Look! The young man is coming. He a pair of cool sunglasses.
A.
puts on
B.
is puting on
C.
is wearing
D.
wear
【判断题】我国通车里程最多的城市是上海
A.
正确
B.
错误
【简答题】Look, the young man _____(run) after the bus.
【单选题】船舶推进装置的传动设备装置,其离合和倒顺车功能的作用()
A.
提高船舶的机动性,延长主机使用寿命
B.
提高船舶的机械效率
C.
满足螺旋桨效率的要求
D.
提高主机的热效率
【判断题】劳动和社会保障部颁发的《企业年金试行办法》规定,企业和职工个人缴费合计一般不超过本企业上年度职工工资总额的1/6。( )
A.
正确
B.
错误
【单选题】劳动和社会保障部颁发的《企业年金试行办法》规定,企业和职工个人缴费合计一般不超过本企业上年度职工工资总额的( )。
A.
40548
B.
40549
C.
40550
D.
40551
【多选题】在Word中,下面能准确选定一个句子的是______
A.
按住Ctrl键单击句子
B.
从句首拖动鼠标到句尾
C.
双击句子
D.
利用Shift键和光标键
【多选题】下面能准确选定一个句子的是( )
A.
按住Ctrl键单击句子
B.
从句首拖动鼠标到句尾
C.
双击句子
D.
利用Shift键和光标键
【多选题】审计人员在确定应收账款函证范围和对象时,应考虑的因素有:
A.
应收账款内部控制的可靠性
B.
函证方式
C.
被审计单位的意见
D.
应收账款的重要性
E.
以前函证的结果
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