数据完整性保护都有哪些技术？
参考答案：
信息摘录技术；数字签名技术；特殊签名技术；数字水印。
3. ---Did your parents take you to go on holiday?
--- I’d love_______ , but there was no room in the car.
A．to
B．to be taken
C．to have been taken
D．to take
无并发症的妊娠足月孕妇的体重约增加：
A．8.5kgB．10.5kgC．12.5kgD．14.5kgE．16.5kg
