以下哪一项不属于开放性损伤：
A．冲击伤B．擦伤C．刺伤D．火器伤E．撕脱伤
参考答案：A
下列属于牙源性囊肿的是(）
A．始基囊肿
B．鼻唇囊肿
C．上腭正中囊肿
D．鳃裂囊肿
E．球上颌囊肿
Soft drinks _______ to children for free in some restaurants on Children's Day.[ ]
A. offer
B. have offered
C. are offered
D. will be offered
