40Cr中含铬量在（）。
A.1%左右
B.0.40%左右
C.1.50%以下
D.4%以下
参考答案：C
---Alice, why didn’t you come yesterday?
---I ____, but I had an unexpected visitor.
A．was going to
B．would
C．had
D．did
五保救助属于( )
A．自然灾害救助 B．城镇居民最低生活水平保障 C．孤寡病残救助D．社会优抚安置
