下列不是急性咽炎的症状的是：（）
A.咽部干燥
B.咽痛
C.耳痛
D.四肢酸痛
E.张口困难
参考答案：E
Luckily for us, when we got there the weather _______ to be fine.[ ]
A. turned up
B. turned out
C. turned over
D. turned into
影响混凝土抗冻性的因素有哪些，并简述之？
