阅读理解。
Last Saturday, my classmates and I went to the Hada Hill for a picnic (野餐) On that day, the weather was fine and the sky was clear and blue, so all of us were excited and happy. We left home and went
there by bike with fruit, eggs, meat, vegetables, cookers (炊具) and some other things.
About one hour later, we arrived at the foot of he hill. There were many nice flowers and green trees.
Birds were singing sweet songs, How happy we were ! Then we were busy with the picnic. Some of us
got water, some cut the meat and vegetables and some cooked, others sat on the grass to wait for a nice
lunch. At one o'clock in the afternoon, our lunch was ready.
After lunch, at three o'clock, we began to climb the hill. We all tried to climb to the top of the hill.
What a happy time we had! I will never forget it.
根据短文内容，选择正确答案。
l. What did they go to the Hada Hill for?
A. Having a picnic.
B. Seeing nice flowers.
C. Eating some fruit.
D. Seeing green trees.
2. What was the weather like that day?
A. Rainy.
B. Windy.
C. Fine.
D. Cloudy.
3. How were they feeling that day?
A. Excited and happy.
B. Bored and tired.
C. Disappointed and tired.
D. Busy and bored.
4. About an hour after leaving home, they _
A. went back from the hill
B. got to the top of the hill
C. got to the foot of the hill
D. began to sing and dance
5. When was the lunch ready?
A. At l:00 p.m.
B. At 3:00 p.m.
C. At 5:00 p.m.
D. At 4:00 p.m.
2Z（g）；△H<0，在不同温度（T1和T2）下，产物Z的物质的量n与反应时间t的关系如图所示，则下列判断中正确的是（ ）