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【单选题】
1mol/L 的 NH 3 · H 2 O 与 0.1mol/L 的 NH 4 Cl 溶液中( )。A.
[NH 4 + ] NH 3 ·H2O >[ NH 4 + ] NH4Cl
B.
[NH 4 + ] NH 3 ·H2O NH 4 + ] NH4Cl
C.
[NH 4 + ] NH 3 ·H2O =[ NH 4 + ] NH4Cl
D.
无法比较
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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】— 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
【简答题】听录音,根据录音把相应的单词填在空格中。(注意:如果有数字,请用英语拼写数字!)
【简答题】6 3. The Prize in Economics (establish) ___________ in 1968, that is, more than half a century ago.
【简答题】看图，选择正确的词组。 ( ) 1. A. play on the computer ( ) 2. B. play with my doll ( ) 3. C. play with my skipping rope ( ) 4. D. play ping-pong ( ) 5. E. play basketball
【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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