保育员的职业特点之一就是集体性，它要求保育员彼此协调，相互宽容，（）。
A、保持距离
B、参加集体活动
C、发挥集体的教育力量
D、共同娱乐
参考答案：C
急性糜烂性胃炎治疗不应使用
A．H2受体拮抗剂
B．质子泵抑制剂
C．黏膜保护剂
D．去除病因
E．胃大部切除
Tom is very happy now. His father with him ______ at the pool.
[ ]
A. have fun swimming
B. has fun to swim
C. have fun to swim
D. has fun swimming
