In most of the time, I am devoted to my research in the lab with my friend Dave, who loves traveling very much. To make our life colorful and relax ourselves, in July, my friend and I are taking a camping trip. We will travel for four weeks and will tour the United States and part of Canada. We have decided to camp because it does not cost as much as vacationing (度假) in hotels.
We have to plan very carefully in advance. First, the car we are going to drive is very small, so we have decided to take only one small suitcase each and as few camping things as possible. We will take some medicine with us to prevent insects (昆虫) from hurting us, and also food for picnics. Second, there is a lot to see in the United States and Canada, so we have to decide on the direction (方向) we want to drive.
The date we are leaving is July 2, from which day we will have two months off. We want to see and do many things on our camping tour. We want to climb in the mountains, visit famous caves, and swim in cool mountain rivers. We want to visit many cities and talk to many people, which I am sure can enrich our experience greatly. We also want to find a hotel room if it rains at night. We expect to have an exciting trip.
小题1: The two friends are going to take a camping trip ________.
A．if they have four weeks’ time off
B．though it will be a long trip
C．so that they can save money
D．because it will be warm enough in July小题2:Which of the following statements is possibly true?
A．They are now on the trip
B．They are going to make a tour all over the U.S and Canada.
C．They are quite rich.
D．July is drawing near.小题3: We learn from the second paragraph that ________.
A．they must be ill.
B．they will bring a lot in the car.
C．they must have studied the map carefully.
D．they must have been hurt by insects.小题4: It is quite clear that ________.
A．there will be no insects at all.
B．they are sure to take some medicine on the trip.
C．the two friends will take turns to drive.
D．the two friends will share a suitcase.小题5: If they are caught in the rain , they will ________.
A．talk to their families while it rains.
B．ask others for help.
C．have to stop climbing.
D．have to stay in a hotel for the night.
2CO(g)，在一定温度下其平衡常数为K。下列条件的变化中，能使K值发生变化的是( )