简述分车绿带的定义。
参考答案:
车行道之间可以绿化的分隔带,其位于上下行机动车道之间的为中间分车带;位于机动车道与非机动车道之间或同方向机动车道之间的为两侧分车绿带。
We found __________ to sleep.[ ]
A. difficult to get
B. it difficult getting
C. it difficult to get
D. that difficult to get
计算:-1-3=______