问题
单项选择题
涡轮流量计是近年来迅速发展起来的一种新型速度式流量计，以下关于其特点叙述错误的为( )。
A．上下游必须有足够的直管段长度
B．仪表常数应根据被测介质的黏度加以修正
C．可测量瞬时流量
D．测量基本误差为±(0.2～1.0)%
答案
参考答案：B
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涡轮流量计是近年来迅速发展起来的一种新型速度式流量计，以下关于其特点叙述错误的为( )。
A．上下游必须有足够的直管段长度
B．仪表常数应根据被测介质的黏度加以修正
C．可测量瞬时流量
D．测量基本误差为±(0.2～1.0)%
参考答案：B
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| Everyone needs friends. But do you know 1 to find real friendship (友谊) and keep it? An American writer 2 Sally tells young students some good ways to find 3 . Sally says finding friendship is just like 4 a tree. You plant the seed (种子) and 5 it to make it grow. She says you should first choose someone 6 can be a good friend. It doesn't matter whether he has money or good looks. A good friend should be kind and 7 . If you have a bad day, a good friend should 8 your complaints (抱怨) and do his 9 to help you. If you want to make a friend, you should make each other 10 . But things cannot always be happy. 11 the best friends may have quarrels. What should you do when you 12 with your friend? You may try to have an honest talk with him when there is no one around. If he 13 want to talk, you can write a letter to tell him how you are feeling. Sally also tells us some small but important things, 14 example, celebrating your friend's success. Remember that friendship is the 15 important thing in your life. Life is great if you have friends! | ||||
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