外研版（三起）（2012）小学英语五年级下册Module 7 Unit 2 I'll be home at seven o'clock.Module 7 Unit 2 I'll be home at seven o'clock.习题(1)

Part I Listening Comprehension (20 minutes) Directions: In this section, you will hear ten short conversations. At the end of each conversation, a question will be asked about what was said. Both the conversation and the question 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. Then mark the corresponding letter on the Answer Sheet with a single line through the center

Directions: In this section, you will hear ten short conversations At the end of each conversation a question will be asked about what was said. Both the conversation and the question 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. Then mark the corresponding letter on the Answer Sheet with a single line through the

Cyclic Codes a cyclic code is a linear block code where if c is a codeword, so are all cyclic shifts of c E.g., 1000, 110, 101,011 is a cyclic code Cyclic codes can be dealt with in the very same way as all other lbc s Generator and parity check matrix can be found a cyclic code can be completely described by a generator string G All codewords are multiples of the generator string In practice, cyclic codes are often used for error detection(CRc) Used for packet networks When an error is detected by the received, it requests retransmission

Directions: In this section, you will hear ten short conversations. At the end of each conversation, a question will be asked about what was said. Both the conversation and the question will be spoken only once.After each question there will be a pause. During the pause you must read the four choices marked A),),C) and D),and decide which is the best answer

Ch. 23 Cointegration 1 Introduction An important property of (1) variables is that there can be linear combinations of theses variables that are I(O). If this is so then these variables are said to be cointegrated. Suppose that we consider two variables Yt and Xt that are I(1) (For example, Yt= Yt-1+ St and Xt= Xi-1+nt.)Then, Yt and Xt are said to be cointegrated if there exists a B such

Directions: In this section, you will hear ten short conversations At the end of each conversation, a question will be asked about what was said. Both the conversation and the question 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. Then mark the corresponding letter on the Answer Sheet with a single line through

Directions: In this section you will hear ten short conversations At the end of each conversation, a question will be asked about what was said. Both the conversation and the question 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. Then mark the corresponding letter on the answer sheet with a single line through

say it just begins to live that day. Emily Dickinson, \A Word\ A particular string of sounds must be united with a meaning and a meaning must be united with specific sounds in order for the sounds or the meaning to be a word in our mental lexicon. A word, then, is a free form which does not consist entirely of (2/3) lesser free forms; in brief

1. abide by(=be faithful to;obey)忠于;遵守。 2. be absent from缺席,不在 3. absence or mind(=being absent-minded-)心不在焉 4. absorb(=take up the attention of)吸…的注意力(被动语态):be