能够保持恒定不变或按照一定规律变化的测量误差称为()。
A.系统误差
B.偶然误差
C.疏忽误差
D.基本误差
参考答案:A
Do you have to be very smart to live a happy life? The character of McDull (麦兜) tells you that this is not true. He is famous for having a birthmark on his right eye. He is not very clever, but he has a heart of gold. He is also happy, with lots of dreams. McDull wanted to visit the Maldives (马尔代夫). But his mother didn’t have enough money for a trip there. So she lied to him and took him to a place called Hong Kong. The place has a sign that says, “Go to the Maldives”. It made McDull very happy. He thought he was really excited in the Maldives!
The cartoon pig character was created (创造) in Hong Kong by Alice Mark and Brian Tse. McDull is just a common pig. He has many dreams, but they never come true. That doesn’t stop him trying. McDull lives his life in a simple and happy way. His idea towards life is “Never give up”.
小题1:McDull is famous for ________.
A.his wonderful character
B.visiting the Maldives
C.having a birthmark on his left eye
D.having a birthmark on his right eye小题2:When McDull came to Hong Kong with his Mum, he felt _______.
A.sad
B.unhappy
C.angry
D.excited小题3:Where was McDull created?
A.Hong Kong
B.Japan
C.America
D.Not mention
居民消费是指直接为居民个人消费的物质和劳务产品价值总值。包括个人生活中的食品、衣着等物质性消费,也包括各种劳务性消费。 根据以上定义,下列属于居民消费的是( )。
A.企业购买的原材料 B.政府购买图书仪器C.家庭购买的文教用晶 D.学校购买的文教用品