下列消毒措施中,HIV不敏感的是()
A.紫外线
B.75%的乙醇
C.0.2%的次氯酸钠
D.高压蒸气消毒法
E.焚烧
参考答案:A
And the horses _______up to the finish line. They're neck and neck... neck and neck all the way.
Oh, the Italian horse Mamma Mia ______ the race.[ ]
A. come; is winning
B. have come; wins
C. are coming; won
D. are coming; wins
一平面简谐波波动表达式为,式中x、t分别以cm、s为单位,则位置x=4cm处的质元在t=1s时刻的振动速度v为()。
A.v=0
B.v=5cm·s-1
C.v=-5πcm·s-1
D.v=-10πcm·s-1