用歧管压力表检测汽车空调系统是，可能出现低压表压力接近真空，高压表压力也低的原因为（）。
参考答案：储液干燥器堵塞
This article is well written because special attention ______ to the choice of words nod style of writing.
A．had been paid
B．has been paid
C．will be paid
D．will have been paid
轧辊由哪几部分组成？其作用是什么？
