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【单选题】
70岁男性，肥胖，暴食后胸痛，疑心肌梗死，测血乳酸脱氢酶同工酶。已知乳酸脱氢酶是由两种亚基组成的四聚体，存在的同工酶种类有（ ）。A.
4种
B.
2种
C.
3种
D.
5种
E.
6种
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【单选题】听力原文：W: Do you like to play chess? M: I like the game and I play often, but I never learned to play well. Q: What conclusion can be drawn from this conversation? (15)
A.
He enjoys playing chess.
B.
He hates playing chess.
C.
He can't play chess.
D.
He was not a good student.
【简答题】一.数字滤波器的频谱特性: 1. H(e^jw) 是数字频率 w rad 的______函数,周期为 __________ , 2. 低频段在 _____ 的整数倍处,高频段在_____________ 的奇数倍处。 二.选频滤波器应注重其( );若对滤波器的时域输出波形有严格要求,如语音合成、数字图像处理等应用场合,选()比较合适。 三.数字滤波器频率特性的频率变量为( )。
【单选题】Who are the speakers?
A.
English majors
B.
senior students at college
C.
beginners in English study
D.
non-English majors at college
【单选题】Who are the speakers?
A.
Waitress and customer.
B.
Hostess and guest.
C.
Shop assistant and customer.
【单选题】— Would you please ______ football near my home? — ______. [ ]
A.
not to play; No
B.
not play; Yes, I will do that again
C.
not play; Sorry, I won't do that again
D.
don't play; Sorry, I won't do that again
【单选题】Who are the speakers?
A.
A Student and a teacher.
B.
An interviewer and clerk.
C.
A student and a president.
D.
An employer and an employee.
【简答题】食品标识可以同时使用汉语拼音或者少数民族文字，也可以同时使用外文，但应当与中文有对应关系，所用外文不得小于相应的中文，但注册商标除外。
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