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问题 多项选择题

下列（）情况下可以停止排油。

A.蒸发器液位下降5%以上

B.蒸发器液位下降3%以上

C.辅助蒸发器液位上升至20%以上

D.辅助蒸发器液位上升至10%以上

答案

参考答案：B, C

单项选择题

在总补体活性测定时，所测定的是（）

A.红细胞与补体结合的能力

B.补体溶解红细胞的活性

C.未标记抗原A

D.溶血素与补体结合的能力

E.特异性抗体与红细胞结合的能力
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                                                     Come to Camp Chippenstock!
      If you're looking for happy summer memories that will last a lifetime. Camp Chippenstock is for you!
We provide fun and meaningful activities for young people aged 12 through 17. Our campers choose from
a wide variety of interesting activities led by an enthusiastic staff, some of whom were once Chinppenstock
campers themselves. Because we are a day camp. Camp Chippenstock is more affordable than many other
camps. Read on to find out how you can participate.
     Camp Chippenstock is surrounded by pine trees, hills, streams, and a large lake. Counselors and assistants
are friendly, caring, and experienced. Each year we get letters from satisfied campers like this one from
Tommy Molina:
     "Camp Chippenstock is a great place to be in the summer. It's everything you'd expect a camp to be
and then some. I had a great summer, met a lot of cool people, and learned to paddle a canoe, I am
definitely coming back next summer."

                                                      ACTIVITIES OFFERED
     Swimming: Visualize(看得见) yourself swimming or diving into a crystal clear pool. Whether you are
a beginner or already swim like a fish, we'll find a class for you.
     Team Sports: Choose from softball, soccer, basketball, and volleyball. Fridays are game days-hot dogs
and all!
     Hiking: See the most beautiful hiking trails in the area and learn about animal tracks, bird calls, and
native plants.
     Canoeing: Glide across the lake or paddle up a stream. You can also take part in all-day canoe trips or
weekly races.
     Crafts: Express your creative side by learning to work with wood, leather, and clay.
     Photography: Learn how to get the pictures you want and how to develop them. Taking good pictures
isn't as simple as it seems, even in this magnificent setting. Bring your own camera or use one of ours.
     Chinppenstock Times: Everyone is encouraged to get involved by becoming a reporter or photographer
for our weekly newspaper.
     Imagine the fun you can have! We start each day at 9:00 A.M. and end at 5:30 P.M… Monday through Friday. Camp begins on June 22 and runs through July 24. Transportation can be arranged for those who
live in the Allentown area. To receive an application, call 1- 888 - 293 - 3151 or write to: Camp
Chippenstock
     P. O. Box 292
     Allentown, NY 10020

1. Tommy Molina's letter is used in the advertisement to ______.
A. prove the camp is wonderful
B. tell the way to meet cool people
C. introduce the great camping place
D. show everybody is eager to come back
2. The information in ACTIVITIES OFFERED shows us that_____.
A. owning a camera is a must to learn how to take pictures
B. weekly competitions will be held by Chippenstock Times
C. classes are available for campers of different swimming levels
D. campers can get close to nature by joining in Craft and Hiking
3. From the advertisement we learn that ______.
A. Camp Chippenstock is intended for all teenagers
B. all the instructors used to be Chippenstock campers
C. we can take part in the camp throughout the summer
D. Camp Chippenstock costs less than many other camps
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