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【多选题】
以下对预应力混凝土的种类和施工技术的要点叙述正确的是哪几项( )。A.
按施加预应力的方式，分为机械和电热两类。机械分为先张法和后张法
B.
后张法生产预应力混凝土构件，可采用台座法或机组流水法
C.
先施工适于在构件厂生产中小型预应力混凝土构件
D.
在后张法施工中，预应力筋承受的张拉力通过锚具传递给混凝土构件，使混凝土产生预压应力
E.
在后张法预应力混凝土中，预应力筋分为有粘结和无粘结两种
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【单选题】利用 QFC-5 微电脑发动机综合检测仪检测点火高压时,由于该机不一定反映实际高压值的变化,故应配合( )来判断点火情况。
A.
点火提前角
B.
断电器触点闭合角
C.
点火波形
D.
点火高压
【简答题】adopt regulate response transform estimate 23. It was difficult to _______ how many people had been wounded in the earthquake. 24. A month ago I wrote to the store ...
【单选题】A month ago I wrote to the store complaining about its had service, but I haven’t gotten a(n) ____yet.
A.
resource
B.
triumph
C.
response
D.
inherit
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【单选题】利用QFC-5微电脑发动机综合检测仪检测点火提前角,应分别测600r/min、1’200r/min和( )r/min三种转速下的点火提前角。
A.
1’800
B.
2’500
C.
2’000
D.
2’500
【单选题】利用QFC—5微电脑发动机综合检测仪检测点火高压(kV),测量中如出现转速不稳或转速偏差太大时,应更换()缸的位置,进行第二次测量。
A.
标准
B.
第一
C.
第六
D.
第四
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