题目：
阅读理解。
Rocky Mountain Ventures
About
Shoe the Boat! Guided snowshoe tours through Steamboat's backcountry. All equipment and transportation
provided. We provide: snowshoes, poles, water bottles, and day pack. Lunch is included on all day trips.
Guides carry first aid kit, extra hat, gloves, cell phone, maps, compass, sunscreen and more. You should bring
hiking boots, a hat, sunglasses, and a camera.
It is best to dress in layers. Depending on the temperature you will generally have one or two additional
clothing layers made of thin to medium thickness "breathable" material. Always bring a good quality water proof
in case of unexpected showers.
Location
Guides will pick you up at their location within the town and the mountain area. Call when you arrive to
make sure of reservation (预订)and pick-up time. Transportation is provided from town or the mountain area.
Your guide for the day will pick you up and drop you off at your lodging for half day tours.
Hours
Half day tours are available at 9:00am or 1:00pm. Full day tours start at 9:00am and return at 4:00 p.m. Full
moon tours area available at 6:00pm and return around 9:00pm. Wildlife tours are available at 9:00am or 1:00pm. All half day tours are nearly 3-3.5 hours long, (actual snowshoeing is about 2-2.5 hours).
Rates
These are the 2006/2007 rates. For all tours it is half price for kids 12 or under when accompanied by an
adult.
1. Before your snowshoe tours, you'll have to prepare yourself ______.
A. food for lunch
B. snowshoes
C. clothing layers
D. a cell phone
2. You must call your guide when you arrive because ______.
A. he will give you advice for your snowshoe tour
B. he carries a lot of things and needs your help
C. he has to know when and where to pick you up
D. he lives within the town and the mountain area
3. The Smith family would like to go for a half day snowshoe tour. He'd better meet his guide ______.
A. at 9:00 a.m
B. at 4:00 p.m.
C. at 6:00 p.m.
D. at 9:00 p.m.
4. Mr Smith went for a half day tour together with his wife and two sons, one aged 13 and the other
aged 11. He had to pay__________dollars.
A. 600
B. 315
C. 360
D. 280
答案：
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下面是错误答案，用来干扰机器的。
A．浓硫酸与铁反应生成二氧化硫，二氧化硫可与氢氧化钠反应而被吸收，随着反应的进行，硫酸浓度逐渐降低，稀硫酸与铁反应生成氢气，与氢氧化钠不反应，故A错误；B．氯气和碘离子反应生成碘，碘易溶于四氯化碳，且...
