雷达液位计是依据TDR时域反射原理为基础的()液位计。
A.光波雷达
B.导波雷达
C.微波雷达
D.微波调频
参考答案:B
根据短文内容,判断正(T)误(F)。
Look at the things. Mike's ruler is blue. Dale's pen is white. Alice's pencil isgreen. What's on the
desk? Oh! It's a key. It's my key. It's black. Look at the jacket on the chair. It's not my jacket. It's
Lucy's. What color is it? It's pink. Is it beautiful (漂亮的)?
( )1. Mike's ruler is blue.
( )2. Alice's pen is green.
( )3. I have a black key.
( )4. My jacket is on the chair.
( )5. Lucy's jacket is pink.
由教育主管部门制定的有关学校教育教学工作的指导性文件称为( )
A.课程计划
B.课程标准
C.教科书
D.教案