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【简答题】
在()年，美国国家标准与技术研究所NIST正式公布高级加密标准AES。
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举一反三
【单选题】Qustions 8 to 11 are based on the conversation you have just heard.
A.
It enables her to improve her pronunciation.
B.
It helps her better remember what she learns.
C.
It turns out to be an enjoyable way of learning.
D.
It proves to be far more effective than writing.
【简答题】直接写得数． 4÷40%= 3 10 × 5 6 = 20×5.5= （ 1 4 + 1 8 ）×4= 1 3 - 1 4 = 2.9+3.4= 0.1÷0.01= 6- 8 15 - 7 15 = 6 7 ÷3= 6× 2 3 = 1 2 ÷ 1 8 = 1÷ 1 3 - 1 3 ÷1=
【单选题】Qustions 8 to 11 are based on the conversation you have just heard.
A.
It keeps her mind active.
B.
It makes her stay awake.
C.
It enables her to think hard.
D.
It helps her kill time.
【单选题】Qustions 8 to 11 are based on the conversation you have just heard.
A.
Inforamtive.
B.
Inspiring.
C.
Dull.
D.
Shallow.
【简答题】变压器利用_____作用,把一种电压的交流电能转变成频率相同的另一种电压的交流电能。
【单选题】Qustions 8 to 11 are based on the conversation you have just heard.
A.
She types on a keyboard.
B.
She does recording.
C.
She takes photos.
D.
She takes notes.
【简答题】变压器利用 作用,把一种电压的交流电能转变成 相同的另一种电压的交流电能。
【简答题】直接写出得数． 36-18= 0.48÷0.3= 2.5×40= 7÷19= 3.7×1000= 18×1%= 1- 6 7 = 7 8 ÷ 3 4 = 1 3 ×（15+ 6 7 ）= 6÷（ 1 2 - 1 3 ）= 1- 2 5 + 3 5 = 3 11 ×9÷ 3 11 =
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