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【单选题】
由单克隆抗体CD干扰素(IFN)、白细胞介素2(IL-2)等多种细胞因子激活后所获取的CD3、CD56表达阳性为主的免疫效应细胞是A.
LAK细胞
B.
NK细胞
C.
CIK细胞
D.
MNC细胞
E.
MSC细胞
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举一反三
【单选题】下列有关网络图的说法中,错误的为( )。
A.
网络图中所谓路径，就是从始点到终点之间相连节点的序列
B.
为了完成整个项目的进度计划，需要找出其中最长的路径，即关键路径
C.
关键路径上的活动称为项目的关键活动，是整个项目中的关键环节
D.
网络中仅存在一条路径
【单选题】It can be inferred that even though the mailsters were small, uncomfortable, and dangerous, they could______.
A.
eliminate the need for relays
B.
carry handcarts and pouches as well
C.
be more protection than an umbrella
D.
reduce wear on shoes
【单选题】There is a small group of words which even some native speakers and writers of English find ______.
A.
puzzling
B.
to be puzzled
C.
to puzzle
D.
puzzle
【单选题】It is strange that the small boy _________ work out such a difficult exercise, which is even hard to settle for adults.
A.
should
B.
might
C.
could
D.
would
【单选题】Even in small companies, computers are a(n) ______tool.
A.
natural
B.
essential
C.
careful
D.
impossible
【单选题】下列有关运动说法错误的是（）
A.
当素材超出黑色范围内后，就不可能看到了
B.
定制并对路径进行修改，实际上是对关键帧的控制
C.
素材运动速度的改变实际上是素材延伸的修改
D.
时间线窗口上的关键帧和运动路径中的节点时不相对应
【单选题】Even in small companies, computers are a(n) tool.
A.
big
B.
small
C.
useful
D.
careful
【单选题】He said he was an insurance salesman, but later on she discovered he was a(n) ______.
A.
alien
B.
counterpart
C.
client
D.
fraud
【单选题】A small number of firms have stopped trading.
A.
hotels
B.
shops
C.
restaurants
D.
companies
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