将0.1mol的两种气态烃组成的混合气体，完全燃烧后得到3.36L（标准状况）CO2和3.6gH2O，下列说法正确的是
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A．一定有乙烯 B．一定有甲烷 C．一定无甲烷 D．可能有乙烷
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第一节 （共10小题；每小题2分，满分20分)
阅读下列短文，从每题所给的4个选项（A、B、C和D)中，选出最佳选项。
A
A few months ago I was at a bus stop in town in the evening. The bus came on time and I took the window seat. The bus route was by the seashore and I was enjoying the breeze （微风) while watching the sea waves. After a few minutes the bus made its next stop. A young boy and a girl got on. They were standing on my left when the bus pulled off. I looked at them curiously and realized that all the window seats were occupied （占据). They could sit but not together. Suddenly a different wave passed through my body and my inner mind gave me the advice to get up. I got up and offered them my seat. The young lady smiled kindly and said thanks. I occupied another seat and we parted our ways. I don’t remember whether I got off the bus before them or not.
Months passed by. Suddenly one day while I was standing at the same bus stop waiting some time for the bus to arrive I heard a voice.
“Excuse me, Uncle.” I looked in the direction of the voice. It was a beautiful young lady.
Puzzled, I said, “I do not know you.”
She said, “Do you remember you gave us your window seat？”
Puzzled, I said, “Maybe, but what is so great in that？”
She said, “If you had not given your seat that day, perhaps I would have not sat with my friend. By sitting together it helped us bridge a misunderstanding that had been between us forever. Do you know we are getting married next month？”
“Good! God bless both of you,” I replied.
The young lady again said thank you and went on her journey. I realized the importance of giving that day.
Why were the young boy and the girl standing on the bus？A. Because they wanted to enjoy the sea view.
B. Because they preferred to stand.
C. Because there were no empty seats.
D. Because they couldn’t sit together.
The underlined sentence in the first paragraph probably means that the author had a feeling that ______.A. he wanted to do something special
B. the sea wave made him upset
C. a wave from the sea flooded him
D. he wanted to make a sea wave in his heart
The author’s act of kindness helped the young boy and the girl ______.A. begin to talk to each other again after a quarrel
B. clear up a misunderstanding between them
C. sit together and become friends very soon
D. know each other and get married
So by the 1600’s Shakespeare was able to ___ ___ __ a wider ___ than ever before.
很多海生甲藻能发光，如夜光虫遇机械刺激或其他刺激都会发光，产生这一现象和决定该行为的分别是
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A．代谢与遗传B．适应性与遗传性C．应激性和遗传性D．应激性和适应性
将1molCH4和一定量的氧气在密闭容器中点燃，充分反应后，甲烷和氧气均无剩余，且产物均为气体（101kPa，120℃），其总质量为72g，下列有关叙述不正确的是
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A．若将产物通过碱石灰，则不能全被吸收，若通过浓硫酸，也不能被完全吸收B．产物的平均摩尔质量为24g/molC．若将产物通过浓硫酸充分吸收后恢复至（101kPa，120℃），则压强变为原来的2/3D．反应中消耗的氧气为56g
当卵细胞达到？时期时，才具备与精子受精的能力。
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A．减数第二次分裂中期B．减数第一次分裂末期C．减数第二次分裂后期D．减数第二次分裂结束成熟