输入至少（）位数字量的D/A转换器分辨率可达千分之一。
A、9
B、10
C、11
D、12
参考答案：B
用单词的正确形式填空。
1. Miss Zhang ____________ (teach) us English last term.
2. We are going to ____________ (fly) a kite this afternoon.
3. ____________ (be) you ready for a quiz?
4. What ____________ (be) the cloud ____________(like)?
5. — What ____________ they ____________ (do) now?
— They ____________ (jump).
甚高频VHF是指（）。
A.3M~30MHz
B.30M~300MHz
C.1M~10MHz
D.10M~100MHz
