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☆☆下列桥梁监测项目传感器选择错误的是（）。 A.
车辆载荷——动态称重系统 B.
结构整体振动——强震动记录仪 C.
地震监测——三项加速度传感器 D.
索力监测——加速度传感器

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What is the best way to prevent food allergy?
A.
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B.
. Asking tourists what they like to eat
C.
Making sure if there are some tourists having food allergy before you meet them
D.
Checking the special requirements have been fulfilled in each restaurant

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考虑到凸性因素，收益率下降引起的债券价格变化高于收益率上升引起的不含权债券价格变化。

A.正确
B.错误