进入三羧酸循环进一步代谢的化学底物是（）。A、乙醇B、丙酮酸C、乙酰CoAD、三磷酸
题型：单项选择题
问题：
进入三羧酸循环进一步代谢的化学底物是（）。
A、乙醇
B、丙酮酸
C、乙酰CoA
D、三磷酸腺苷
题型：单项选择题
阅读理解
I am Catherine. I love rock very much. I m
ean I like climbing mountains not rock mu
sic. I
like touching the rock and reading the face of the rock. I like it a lot. I feel at home on the side
of a mountain. Climbing is only my hobby. I have two long holidays every year. I often climb
mountains during the holidays. I am different from other climbers. I often climb the mountains
without ropes(绳子). I climb many mountains in many countries but most often in the A mountains
near D City, where I live.
I started climbing near my home in Paris when I was five years old. I was good at climbing
at that time. I joined Climb Club to learn more when I was fourteen years old. I won my first
competition in Italy in 1995.
Three years ago I tried to find a new route(路线) up the b Mountain near D City. The climb
took eleven days and at last the snow was so heavy that I could not move. I’m going to try again
this year.
1. Catherine didn’t start climbing mountains until __________.
A. she was five
B. she joined the club
C. 1995
2. On the side of a mountain she always feels __________.
A. worried
B. happy
C. lucky
3. Catherine joined the Climb Club when she was __________ years old.
A. 5
B. 14
C. 16
4. She couldn’t climb up the B Mountain, because __________.
A. Catherine lost her way
B. the climb took 11 days
C. it was too hard for her to move in the snow
5. Which of the following is true according to this passage?
A. Catherine won her first competition in France in 1995.
B. Most climbers climb the mountains without ropes.
C. Catherine lives somewhere near Chamonix.