光缆敷设接续或固定安装时的最小容许弯曲半径不应小于护套外径的（）倍。
参考答案：20
用所给动词的适当形式填空。
1. There ______________ (be) some tea in the bottle.
2. Tom ______________ (get) up early this morning.
3. It ______________ (be) seven o'clock.
4. Tom ______________ (play) basketball with his friends yesterday afternoon.
5. We ______________ (be) to the Great Wall twice.
试制定一个小麦病害综合防治方案。
