Heart disease is the No.1 killer in the U.S. It kills more women than all the cancer diseases.
查看答案
Only 50% of the women who have the aboved atypical symptoms will ask for medical help. This makes them more possible to die.
A. 对
B. 错
The heart disease in women have atypical symptoms:
A. shortness of breath
B. light headedness
C. pain in the jaw, neck and arms
D. nausea
E. cold sweats
F. extreme fatigue
热敏电阻，顾名思义是一种对温度敏感的特殊电阻元件
A. 对
B. 错
PTC适合用来制作温度传感器，而NTC不可以。
A. 对
B. 错
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