多功能或复费率安装式电能表时段投切误差应不大于1min。
参考答案：错
预期收入理论认为，只要未来收入有保障，长期信贷和消费信贷就能保持流动性和安全性。
No matter how healthy you _____be，you need to consult a doctor from time to time.
A．should
B．will
C．must
D．may
