使用水泥的温度低，而井下（），或井下遇到高压盐水层，以致早期凝固。
A、温度过高
B、温度过低
C、注灰深度较浅
D、套管变形
参考答案：A
Iran’s lack of sincerity in discussing the nuclear issue has been criticized by EU foreign policy chief. True False
Make sentences. 连词成句。
1. friends with play my I like to
2. play with We Liu Tao's ball catch
3. is hard My dresser
4. It's for a to walk fun go
5. play I to ping-pong want
