反向覆盖测试时，移动发射机MT需配置哪些主要参数？（）
A.测试时间
B.测试频点
C.测试时隙
D.测试发射功率
参考答案：B, C, D
根据句意及首字母提示补全单词。
1. Liu Xiang broke the Olympic r_______ and won a gold medal in the 2004 Athens Olympics.
2. They are l_______ for Beijing the day after tomorrow.
3. Cui Hua, shall we s_______ the sour cabbage (酸菜)?
4. When you get home from school, you should r_______ yourself with music.
5. Jane is always careful, but her brother is always c_______.
随着制作工艺和材料的进步，全瓷固定桥也可适用于后牙四单位桥的修复。（）
