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【单选题】
气缸盖裂纹多发生在( )。A.
进气门四周
B.
排气门附近
C.
相邻两缸燃烧室之间
D.
进、排气门座之
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举一反三
【单选题】Today a large coal-fired power plant can give out in a single year as much poisonous gas as was blown out by the May 18,1980 outbreak of Mount St. Helens, ______ some. 400,000 ton.
A.
its amount was
B.
amounts to
C.
amounting to
D.
it was amounted
【单选题】以下L－规则执行5次（n=5）后的植物模型为？ω: Xp: {p1, p2}p1: X->Yp2: Y->YX
A.
YXYYX
B.
YXYY
C.
XXYYX
D.
XYXYX
E.
YYXXY
【简答题】根据句意及首字母或汉语提示完成单词 1. There are lots of beautiful flowers in the g ______. 2. There is a big b______ over the river (河). 3. Your room is a little d______. Please clean it. 4. We often go to eat dinner ...
【单选题】下列关于输血前的准备工作哪一项是错误的
A.
做血型鉴定和交叉配血试验 、两个人核对姓名、血型及交叉配血结果
B.
输血前先输少量生理盐水
C.
从血库取出库存血后勿剧烈振荡
D.
冬季库存血在输入前应加温以免寒冷刺激
【单选题】______ all cooking was done over coal-fired ranges.
A.
Truly
B.
Virtually
C.
Very
D.
Really
【单选题】The net efficiency of a coal-fired plant is usually less than ( ).
A.
30%
B.
40%
C.
50%
D.
60%
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