待修设备的各个方面必须有()明显的断开点。
A、1个
B、2个
C、3个
D、4个
参考答案:A
读一读,判断句子的正误,对的打“√”,错的打“×”。
( ) 1. One day, a tiger sleeps in a river.
( ) 2. A monkey likes to eat meat for breakfast.
( ) 3. A lion lives in the forest.
( ) 4. Camels can fly.
( ) 5. A bird lives in a tree.
( ) 6. A panda lives in a hole.
( ) 7. A zebra has a pouch.
1岁婴儿每日需要的睡眠时间是()
A.8~10小时
B.10~12小时
C.12~15小时
D.15~16小时
E.16~18小时