质量控制处检测出磨水泥中SO3检测结果为3.09，应属（）。
A、重大质量事故
B、未遂质量事故
C、质量事故
D、一般工序质量事故
参考答案：D
—I’m stressed out. I have so much work to do every day.
—You ‘d better rest very often. And it’s good for you to take some ____,I think.
A．health
B．exercise
C．lesson
D．work
医院感染的种类包括自身感染，______，______和代入传染。
