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【单选题】
以下不属于抗原提呈细胞的是A.
吞噬细胞
B.
树突状细胞
C.
B细胞
D.
血管内皮细胞
E.
T细胞
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举一反三
【单选题】This is the factory _____ we paid a visit yesterday.
A.
where
B.
that
C.
the one
D.
to which
【单选题】A production worker is paid a salary of $500 per month, plus an extra 10 cents for each unit produced during this month. How is this type of labour cost best described ?
A.
A semi- fixed cost
B.
A variable cost
C.
A fixed cost
D.
A step cost
【多选题】从自动下降继电器的电路图分析,哪几个插脚是控制自动下降继电器工作的 ( )
A.
8/30脚
B.
6/S1脚
C.
4/67脚
D.
5/S2脚
E.
2/87a脚
F.
以上插脚都是
【单选题】If this bill is not paid within ten days, your gas supply will be cut_____.
A.
in
B.
up
C.
down
D.
off
【单选题】Is this tourist attraction you paid a visit to several days ago? A．that B．whichC．the oneD．where
A.
Is this tourist attraction____you paid a visit to several days ago? A．that
B.
which
C.
the one
D.
where
【单选题】关于砂轮机使用时，以下说法不正确的是：（）
A.
砂轮机的砂轮部分要有保护罩
B.
砂轮片如果很厚，不用经常检查
C.
砂轮机必须在指定的区域内使用
D.
砂轮机工作间不得存放任何易燃的物质
【单选题】After the wedding, there is nearly always a “reception”. This is paid for by the _____ parents.
A.
groom’s
B.
bride’s
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