根据《现场设备、工业管道焊接工程施工及验收规范》，对有再热裂纹倾向的焊缝进行表面无损

下列词语中加点的字，读音全都正确的一组是（   ）

A．刹那（shà）倥偬（zǒng）拗不过（niù）翠堤春晓（dī）

B．戏谑（xuè）沏茶（qī）闹别扭（biè）蓦然回首（mò）

C．噱头（xué）谮言（jiàn）揪辫子（jiū）文以载道（zài）

D．滂沱（pāng）浸渍（zé）压轴戏（zhòu）折冲樽俎（zǔ）

诊断室速最有力的心电图证据是（）

A.心率140～200/分钟

B.R-R>P-P（房室分离）

C.QRS波群增宽>0.12秒

D.出现心室夺获或室性融合波

E.节律整齐或轻度不齐

短文改错。

     My sister saw a lovely cup when we are shopping the other day. She liked it at once. Then she

bent down and picked up to look at a price on it. As she did this, lots of tea splashed on his T-shirt!

I had to try hardly not to laugh at her shocked face! My sister wanted get out of the shop as fast as

she could when a shop assistant came over to us. It was turned out to be her own cup, that she’d

left on the shelf by mistake. The assistant was clearly as embarrassing as my sister, for I just thought

it was funny!

方向控制回路换向后仍向前冲的原因是换向阀换向滞后，应在速度换接部位并联一个（）。

A.减压阀

B.顺序阀

C.单向阀

D.溢流阀

引燃煤尘爆炸的高温热源在（）度。

A、300－500

B、610－1050

C、500－1000

D、100－200