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【单选题】
营养是人体A.
摄取 、 消化 、 吸收和利用营养素的过程
B.
身体不佳时补充营养素的过程
C.
为维持生命从食物中摄取营养的过程
D.
为了改善生活，调配膳食的过程
E.
为促进机体生长发育而摄取食物的过程
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皮皮学刷刷变学霸
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【单选题】听力原文：The birthplace was to open at 10 a. m. It was 9: 30 and already the pilgrims had formed a queue. I asked a lady from Ohio why she had come. 'For Shakespeare, 'she said. 'Isn't that why you came?'...
A.
U. S.A.
B.
Europe.
C.
Ohio.
D.
His hometown.
【简答题】计算机网络的安全威胁有哪些?(答案用分号隔开)
【简答题】求图1.13所示电路中开关S闭合和断开两种情况下a、b、c三点的电位。
【简答题】对计算机网络安全威胁有哪些？对网络管理的安全威胁有哪些？
【简答题】嘌呤核苷酸从头合成的原料有( )、 ( )、( )及( )等,合成的限速酶是( ),第一步合成的是( ),重要的中间产物是( ),后者与Asp作用生成( ) ,另外还可脱氢并与Gln作用生成( )。
【单选题】Man: The train was supposed to arrive at 9 oclock. Woman: Nine oclock! But its already 9: 30. Question: What does the woman mean?
A.
The train is always late.
B.
She's sorry it's already 9: 30.
C.
The train is arriving at 9: 30.
D.
The train is already late.
【单选题】I __ already __ my homework by 9:30 last night. [ ]
A.
win, finish
B.
have, finished
C.
had, finished
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