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【判断题】
Professor Lee is talking with a group of students from Yizhou High School. Now Li Hua is asking a question and Professor Lee is answering. Li Hua: When I hang out with American friends, I’m always afraid to speak. I feel like they will laugh at my accent( 口音 ). What can I do, Professor Lee? Professor Lee: It’s a good question! This is a typical problem among you students. First, it’s OK to speak English with an accent. It shows who you are and where you’re from. English is an international language. English speakers from the US, the UK, Australia, and South Africa all have different accents. In fact, correct grammar and word choice are much more important. Second, most foreigners are friendly and will not laugh at you. So just relax and be yourself. I always tell my students, “Don’t be shy. Just try!” If you have a chance, take it. Finally, failure is the best teacher. As the saying goes, “Failure is the mother of success.” Michael Jordan, the greatest basketball player of all time, found the secret to success. He said, “I’ve failed over and over again in my life. And that’s why I succeed.” Li Hua tells Professor Lee about his worry.( )
A.
正确
B.
错误
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【单选题】急性化脓性腹膜炎时,如腹腔穿刺液呈血性臭味液,首先考虑是
A.
胃、十二指肠溃疡穿孔
B.
肝破裂
C.
脾破裂
D.
结肠破裂
E.
绞窄性肠梗阻
【单选题】向前纠错差错控制方法的特点是( )。
A.
能够检测出错码,但不能确定错码的准确位置
B.
方法、原理和设备较简单,且实时性强
C.
传输效率低,纠错设备比较简单
D.
实时性强,纠错设备比检错设备复杂
【简答题】Internet起源于美国国防部主持研制的_______________。
【单选题】前向纠错差错控制方法的特点是()
A.
能够检测出错误,但不能够纠正
B.
能够检测出错误,但不知道错误的准确位置
C.
需反复重发,传输效率低
D.
实时性强,但是纠错设备复杂
【单选题】若有arr=['Mon','Tues','Wed','Thurs'],则shift()返回的是
A.
Mon
B.
Tues
C.
Wed
D.
Thurs
【单选题】前向纠镇差错控制方法的特点是()。
A.
能够检测出错误,但不能够纠正
B.
能够检测出错误,但不知道错误的准确位置
C.
需反复重发,传输效率低
D.
实时性强,但是纠错设备复杂
【判断题】孔公差带代号F8 中F 确定了孔公差带的位置。( )
A.
正确
B.
错误
【单选题】Because I Could Not Stop for Death Because I could not stop for Death— He kindly stopped for me— The carriage held but just Ourselves— And Immortality. We slowly drove—He knew no haste, And I had put ...
A.
sorrow
B.
hurry
C.
guilt
D.
emotion
【简答题】急性化脓性腹膜炎时,如腹腔穿刺液呈血性臭味液,首先考虑是 A.胃、十二指肠溃疡穿孔    B.肝破裂    C.脾破裂 D.结肠破裂    E.绞窄性肠梗阻
【单选题】DVD光盘采用的数据压縮标准是______
A.
MPEG-1
B.
MPEG-2
C.
MPEG-4
D.
MPEG-7
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