题干
The ______ look suggested that there must be something ______ around her.
A：scaring; scared
B：scared; scaring
C：scaring ; scaring
D：scared; scared
答案(点此获取答案解析）
B
H+ + OH─，在不同温度下其平衡常数为K（25℃）=1．0×10-14，K（35℃）=2．1×10-14，则下列叙述正确的是 （ ）