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将原料并排放置,然后从上至下一层层取出,进行混和,这种方法为横铺直取法。( )
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“程差混和”多仓混棉机,路程差越大、仓数越多、纤维密度越大,则混和效果越好。( )
[音频]Section ADirections: In this section you will hear 10 short conversations. At the end of each conversation, a question will be asked about what was s aid. 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 suggested answers marked A），B），C）and D）and decide which is the best answer.1.A) She's going away for a while.B) She did well on the test.C) She worked hard and earned a lot of money.D) She's didn't have to work hard for the exam.2.A) Susan is fast workerB) Susan did Jack's homework.C) Susan didn't do the homework on her own.D) Susan has not finished her homework.3.A) He read the cabinet report.B) He read the newspaper.C) He listened to a radio report.D) He's secretary telephoned him.4.A) Hurry to the conference.B) Skip the conference.C) Take the subway.D) Take a bus.5.A) He is confident.B) He is worried.C) He is bored.D) He is angry.6.A) He used to be a workman himself.B) He likes to do repairs and make things himself.C) He is professional builder.D) He paid workmen to decorate the house.7.A) The woman doesn't like jam.B) The woman forgot where she had left the jar.C) The man had an accident.D) The man broke the jar.8.A) Opinions about the book are varied.B) The man thinks the book is excellent.C) You shouldn't believe everything you read.D) The woman wonders which newspaper the man is reading.9.A) It's quite normal.B) It's too high.C) It's cheap indeed.D) It could be cheaper.10.A) The admission of a patient.B) Diagnosis of an illness.C) The old man's serious condition.D) Sending for a doctor.
喉炎时易水肿的是
当吞咽食物时,可盖住喉口,防止食物进入气管的是。
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