对同一单位定期开户证实书只能签发（）次。
A、一
B、二
C、三
D、四
参考答案：C
The number of college graduates ________ surprisingly large and a large number of them ________
unable to find a proper job. [ ]
A. is; is
B. are; are
C. are; is
D. is; are
为儿童配备安全座椅属于预防意外伤害的（）
A.主动干预
B.教育干预
C.技术干预
D.强制干预
E.紧急处置
