室内空气多点采样时应按对角线或梅花式均匀布点,采样点应避开(),离墙壁距离应大于()m,离门窗距离应大于()m。
参考答案:通风口;0.5;1
Eugene' s never willing to alter any of his opinions. It' s no use ________ with him.
A.to argue
B.arguing
C.argued
D.having argued
护发产品,可以补充头发的营养,通过()吸收.
A.鳞状表层
B.纤维皮层
C.髓质层
D.按摩