[不定项选择题]低应变法现场检测桥梁基桩完整性原理及现场检测技术：2）现场准备工作包括（ ）。（2017真题）
A.A：现场踏勘
B.B：资料收集
C.C：桩头处理
D.D：传感器安装

[不定项选择题]低应变法现场检测桥梁基桩完整性原理及现场检测技术：2）现场准备工作包括（ ）。（2017真题）（2017检师真题）
A.现场踏勘
B.资料收集
C.桩头处理
D.传感器安装

[不定项选择题]低应变法现场检测桥梁基桩完整性原理及现场检测技术：5）结果分析包括（ ）。（2017真题）
A.A：桩身波速平均值确定
B.B：桩身缺陷位置计算
C.C：桩身完整性判断
D.D：混凝土强度计算

[不定项选择题]低应变法现场检测桥梁基桩完整性原理及现场检测技术：3）仪器需要设置的参数包括（ ）（2017真题）
A.A：采样频率
B.B：采样点数
C.C：适调放大器
D.D：脉冲宽度

[不定项选择题]低应变法现场检测桥梁基桩完整性原理及现场检测技术：1）低应变的原理是，把桩视为一维弹性匀质杆件，当桩顶收到激励后，压缩波以波速C沿桩身向下传播，当遇到桩身波阻抗或截面积变化的界面时，在界面将产生（ ）。（2017真题）
A.A：反射波、透射波
B.B：绕射波、折射波
C.C：反射波、吸收波
D.D：反射波、绕射波

[不定项选择题]低应变法现场检测桥梁基桩完整性原理及现场检测技术：4）信号采集要求正确的事（ ）。①根据桩径大小，在与桩心对称处布置（ ）个测点。②实测信号能反映桩身完整性特征，有明显的桩底反射信号，每个测点记录的有效信号不宜小于（ ）个。③不同测点及同一测点多次实测时域信号一致性好，否则找出问题后进行重测。④信号幅值适度，波形光滑，无毛刺、振荡出现，信号曲线最终（ ）。（2017真题）
A.A：2~4个、3个、归零
B.B：1~2个，2个，归零
C.C：1~2个、3个、归一
D.D：2~4个，2个、归一

[不定项选择题]共用题干 Animal's “Sixth Sense”
A tsunami（海啸）was triggered（引发）by an earthquake in the Indian Ocean in December, 2004.It killed tens of thousands of people in Asia and East Africa. Wild animals,1， seem to have escaped that terrible tsunami. This phenomenon adds weight to notions that they possess a“sixth sense” for2 ,experts said.
Sri Lankan wildlife officials have said the giant waves that killed over 24,000 people along the Indian Ocean island's coast clearly 3 wild beasts,with no dead animals found.
“No elephants are dead,not4a dead rabbit. I think animals can5 disaster.
They have a sixth sense. They know when things are happening,” H. D. Ratnayake,deputy director of Sri Lanka's Wildlife Department,said about one month after the tsunami attack. The6washed floodwaters up to 2 miles inland at Yala National Park in the ravaged（被 毁坏的）southeast, Sri Lanka's biggest wildlife7and home to hundreds of wild elephants and several leopards（豹）.
“There has been a lot of8 evidence about dogs barking or birds migrating before volcanic eruptions（火山爆发）or earthquakes. But it has not been proven ,” said Matthew van Lierop,an animal behavior 9 at Johannesburg Zoo.
“There have been no10studies because you can't really test it in a lab or field setting , ” he told Reuters. Other authorities concurred（同意）with this11.
“Wildlife seem to be able to pick up certain12 ,especially birds…there are many re- ports of birds detecting impending（迫近的）disasters , ” said Clive Walker , who has written several books on African wildlife.
Animals13 rely on the known senses such as smell or hearing to avoid danger such as predators（食肉动物）.
The notion of an animal “sixth sense”一or14other mythical power一is an enduring one which the evidence on Sri Lanka's ravaged coast is likely to add15. 12._________
A.way
B.behavior
C.principle
D.phenomenon