问题
单项选择题
下面关于热管换热器的安装，说法不正确的是( )。
A．热管换热器的安装只能垂直放置，不得水平或倾斜放置
B．为提高热管换热器的热效率，在安装新风管和回风管时，应使两侧气流为逆流形式
C．用软管连接换热器与风管，以便控制设备安装的倾斜度
D．换热器中分隔板和热管连接处要保证严密
答案
参考答案：A
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下面关于热管换热器的安装，说法不正确的是( )。
A．热管换热器的安装只能垂直放置，不得水平或倾斜放置
B．为提高热管换热器的热效率，在安装新风管和回风管时，应使两侧气流为逆流形式
C．用软管连接换热器与风管，以便控制设备安装的倾斜度
D．换热器中分隔板和热管连接处要保证严密
参考答案：A
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| My son Joey was born with club feet. The doctors said that with treatment he would be able to walk, but would never run very well. The first three years of his life was 1 in hospital. By the time he was eight, you wouldn't know he has a problem when you saw him 2 . Children in our neighborhood always ran around 3 their play, and Joey would jump and ran and play, 4 . We never told him that he probably wouldn't be 5 to run like the other children. So he didn't know. In 6 grade he decided to join the school running team. Every day he trained. He ran more than any of the others, 7 only the top seven runners would be chosen to run for the 8 . We didn't tell him he probably would never make the team, so he didn't know. He ran four to five mile every day-even when he had a fever. I was 9 , so I went to 10 him after school. I found him running 11 . I asked him how he felt."Okay," he said. He has two more miles to go. Yet he looked straight ahead and kept 12 . Two weeks later, the names of the team 13 were caked. Joey was number six on the list. Joey had 14 the team. He was in seventh grade - the other six team members were all eighth graders. We never told him he couldn't do it … so he didn't know. He just 15 it. | ||||
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