题目内容
When you are active or ____________________ (2 words), the heart needs even more blood. But if the coronary arteries become blocked, there might not be enough blood flow to the _________________________(2 words).
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This lack of blood and oxygen, which is called ischemia, might cause symptoms like an irregular heart rhythm, __________________________________(3 words) and angina which is another name for ______________________________( 4 words) in your chest.
Longer periods of ischemia can also cause serious irregular heart rhythms and ___________________________( 2 words) which can be fatal.
Direction: Watch the video clip and number the statements in the order you heart them.
时频的测量误差来源主要是量化误差、触发误差和标准频率误差。
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