下列哪项与类风湿关节炎病情活动有关
A．晨僵B．关节畸形C．关节功能障碍D．颈部受累E．X线片有骨质破坏
参考答案：A
We can no longer ________ to consider water an almost free resource that we can use as much as we like.
A．permit
B．afford
C．expect
D．offer
载波机所有信号都发不出去，应首先检查（）
A.发信载频停振
B.收信载频停振
C.自动交换系统情况
