急性炎症反应中，最先出现的血管变化是（）
A.血流停滞
B.血管扩张
C.血流缓慢
D.血管收缩
E.血流加快
参考答案：D
根据下列句子所给汉语意思或提示，写出空缺处单词的正确形式。
小题1:Several companies are________(竞争)for the contract.
小题2:We have ________ (做广告)our new product in the local newspaper.
小题3:________(除去) the mud from your shoes before you come in.
小题4:She took a ________ (点着的)candle into the room, and the dark room lit up at once.
小题5:The new company welcome (apply) form graduates from Tsinghua University.
水泵轴承发热的主要原因有哪些？
