Section A
Directions: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the conversation and the questions will be spoken only once. After each question there will be a pause. During the pause, you must read the four choices marked A, B, C and D, and decide which is the best answer.
听力原文:M: Is this the way to McGraw Books?
W: Yes, it is. Turn left at the Second Avenue. Go about three blocks, and you'll see the bookstore on your right. It's next to the post office.
Q: What is the man looking for?
(12)
A.A post office.
B.A department store.
C.A bookstore.
D.A drug store.
第1题
下列说法不正确的是()。
A.绝对误差是给出值与真值的差值
B.设Xi为给出值,XT为真值,则绝对误差Ei=Xi-XT
C.绝对误差的数学表达式为Ei=XT-Xi
D.绝对误差与误差的绝对值不是同一概念
第4题
测量误差是指测量仪表的指示值与被测量的()之间存在的偏差值。
A.真实值
B.测量值
C.指示值
D.示值
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