Is it ok if i borrow this necklace? ____1___Yeah, but be really careful with it, OK? ____2____
A. 1.AP2.GP
B. 1.GP 2. PR
C. 1.PR 2.GP
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1 Children have made fantastic things _________the school started
A. for
B. since
2 Tinkering School has been around ________many years now
A. for
B. since
心悸病因有:
A. 心脏收缩力增强
B. 心律失常
C. 心脏神经症。
判断心悸时最常用辅助检查是：
A. 心电图
B. X线胸片
C. 超声心动图
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