华为技术的利润总额占其总营业收入的比重为()
A.19.1%
B.19.3%
C.18.7%
D.18.1%
参考答案:B
—Michael has a temperature, so he isn’t able to come.
—____
A. I’m sorry to hear that. B. Take it easy. C. Good luck.
乳胶凝集试验主要检测类风湿因子的类型是()
A.IgG型
B.IgE型
C.IgA型
D.IgD型
E.IgM型