以下哪些属于天馈线系统性能检查的内容：（）
A.天馈线驻波比
B.通道输出功率
C.天馈线接头和防雷接地检查
D.功放检查
参考答案：A, B, D
—How far apart do they live?
—________I know, they live in the same neighbourhood.[ ]
A. As long as
B. As far as
C. As well as
D. As often as
以上哪项为溃疡性结肠炎较常见的镜下表现（）
A．肠黏膜多发浅溃疡伴充血、水肿
B．肠腔内多处息肉，形态不规则
C．肠黏膜充血、水肿、环形溃疡，其边缘鼠咬状
D．肠黏膜裂隙样深溃疡
E．回盲部溃疡伴息肉
