通货膨胀的成因有( )。
A．需求拉动
B．成本推动
C．结构牵动
D．贸易推动
E．国际传递
参考答案：A,B,C,D
100，000级洁净厂房≥0.5微米的尘埃粒子数应<3，500，000/立方米，浮游菌/立方米≤500，沉降菌/皿≤（）。
Speaker A: Nancy, you look very well.
Speaker B: Thank you, Jane. You look wonderful too. Your weekend swimming must have done good to you.
Speaker A: ().
A. You think so That’s encouraging.
B. That’s very kind of you.
C. Are you serious Thank you anyway.
D. Are you kidding I don’t believe it.
