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【单选题】
可以诱发鱼、禽、大鼠和猴子等多种动物肝癌的真菌毒素是( )。A.
烟曲霉毒素
B.
橘青霉毒素
C.
黄曲霉毒素
D.
霉毒素
E.
赭曲霉毒素
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皮皮学刷刷变学霸
举一反三
【单选题】设函数 f(x)= 4x+2 x 2 -1 - 3 x-1 (x＞1) a-1(x≤1) 在点x=1处连续，则a=（ ）
A.
、 1 2
B.
） 2 3
C.
） 4 3
D.
） 3 2
【单选题】Suppose that real interest rates in the United States rise relative to real interest rates in Switzerland, there would occur a (an):
A.
Increase in the demand for francs--decrease in the supply of francs-depreciation of the dollar
B.
Increase in the demand for francs--decrease in the supply of francs-appreciation of the dollar
C.
Decrease in the demand for francs--increase in the supply of francs-appreciation of the dollar
D.
Decrease in the demand for francs--decrease in the supply of francs-depreciation of the dollar
【单选题】Is Brain Death a Real Death? Suppose a man has a car accident. He is hurt badly and is unconscious (失去知觉的) ;that is, he can't think, speak, or hear. His family takes him to the hospital. The doctors t...
A.
must feel
B.
feels no
C.
sometimes feels
D.
probably feels
【单选题】Suppose real GDP exceeds potential real GDP. If the government decreases its expenditures on goods and services, then real GDP ( ) and the price level ( ).
A.
decreases; rises
B.
increases; falls
C.
decreases; falls
D.
increases; rises
【简答题】设函数 f(x)= 1+x -1 x ，(x≠0) a ，(x=0) 在x=0处连续，则实数a的值为 ．
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