TCAS中，在HIS上出现”口”符号代表：（）.
A、决断咨询
B、交通咨询
C、附近飞机
D、其它飞机
参考答案：C
—What did he say in the letter?
—He said he arrived safely and mentioned other matters ________. [ ]
A. as well
B. too
C. as well as
D. also
热电偶测温回路有哪些基本性质？
