题目内容
混凝土护坡伸缩缝内的填充料若有流失，应直接按设计补充填料。
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Q&A section is considered most difficult part in the speech is because you never know what questions will be asked and almost have no time to prepare for it.
The best answer to the question should be long enough so that you can make yourself keep talking.
Look over your prepared speech and anticipate possible questions about it.
从语音的物理属性看，普通话中的声调主要是由语音的（）变化决定的。
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