真空接触器中装设阻容保护元件是为了减少过电流。（）
参考答案：错
---How can I get to the post office? ---Walk this road, turn left the third crossing. It’s the right.
A．down; at; on
B．on; along; in
C．through; in; on
D．along; on; at
判断心脏功能负荷试验结果时，其EF绝对值比静息时应增加多少以上()
A．5%
B．10%
C．15%
D．20%
E．30%
