测温元件应安装在被测介质温度处，避免装在阀门、（）以及（）的死角附近。
参考答案：弯头；管道和设备
I've learned______ ,no matter what happens and how bad_______ seems today,life goes on and it will be better tomorrow. [ ]
A. that ; it
B. it ; that
C. it;it
D. that;that
以下事项中属于或有事项的有（）。
A.产品质量保证
B.重组义务
C.待执行合同变为亏损合同
D.应收账款计提坏账准备
