ATT旗表示什么意思（）.
A.无效的高度数据
B.无效的姿态数据
C.无效的速度数据
D.无效的航向数据
参考答案：B
— Can you _____________ Chinese?
— No, but I often _____________ with my friends _____________ Chinese.[ ]
A. tell; say; at
B. speak; talk; in
C. speak; tell; in
D. speak; say; in
