什么叫一次循环压井法（工程师法）
参考答案：
一次循环法是发生溢流关井后，将配置的压井液直接泵入井内，在一个循环周内将溢流排出井口并压住井的方法。
—It's reported that the 29th Olympic torch (奥运火炬) is going to travel to 135 cities around the world.
— exciting the news is! And it will arrive at the opening ceremony(开幕式)on August 8th, 2008. [ ]
A. What
B. How
C. What an
D. How an
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