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单项选择题

某乙烯裂解炉年运行时间8000h，每年计划清焦作业5次，每次36h，烟气排放量为42000m3/h，氮氧化物浓度为240mg/m3。单台裂解炉在非正常工况时年排放氮氧化物的总量是（　　）t/a。

A.0.01
B.0.36
C.1.81
D.14.51
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单项选择题
Karen Maclnnes had spent nine months in the hospital. As she grew weaker, the 16-year-old girl asked her parents, "Am I going to die?"
Her mother told Karen the truth. After learning the bad news, all Karen wanted was to go home. Her parents decided to satisfy her wish－no matter that medical fund（基金）, which had helped pay for Karen's hospitalization, would not cover any of the full time medical care she would need at home. When she was carried through her front door, Karen smiled for the first time in months.
A friend of the Maclnnes family, Sheila Petersen, knew of this and offered to help. She volunteered（自愿）not only to find nurses, but also to raise money for Karen's care. Money was received from so many people that Sheila created a fund, "Friends of Karen".
After leaving the hospital, Karen lived for 11 months. "And those months were happy ones for her," says her mother, "thanks to Sheila."
Even after Karen died, people kept sending money. Sheila put it into the fund, tried to find someone else who needed help. By last month, Friends of Karen was helping 70 families.
"I still have a relationship with each family," says Sheila. "We have four children who are near death now, and I want to be there for them." Sheila admits（承认）the work is sometimes difficult, but says, "the smile on a child's face makes it all worthwhile（值得的）."
Sheila helped Karen's parents by ____
A.givingthemmoney
B.raisingmoneyfromothers
C.findingnursesforthem
D.payingforKaren'shospitalization
问答题
简述扭曲滤镜组中的滤镜有哪些？
不定项选择
​微生物学名和植物及动物相似，采用双名法，由属名和种名组成，属名和种名的第一个字母都要大写（   ）。‎
A．正确
B．错误
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