层流洁净病房空气的细菌监测标准
A.≤5cfu/m2B.≤10cfu/m2C.≤15cfu/m2D.≤200cfu/m2E.≤500cfu/m2
参考答案:B
We saw the ________ houses and the ________ trees all over the village-it must have been hit by a
hurricane.[ ]
A. ruined; falling
B. ruining; falling
C. ruined; fallen
D. ruining; fallen
亚运会裁判员、技术官员是怎么选派的?