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【单选题】
脂肪的产量系数A.
4千卡
B.
6千卡
C.
9千卡
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举一反三
【单选题】听力原文：W：The visiting economist is speaking tonight．But Dr. Johnson doesn't seem to think much of him． M：That is because Dr. Johnson comes from an entirely different school of thought. Q：what do we lear...
A.
The visiting economist has given several lectures.
B.
Dr. Johnson and the guest speaker were schoolmates.
C.
Dr. Johnson invited the economist to visit their college.
D.
The guest lecturer's opinion is different from Dr. Johnson's.
【单选题】下列变形中，正确的是（ ）
A.
-a+b -x-y = a+b x-y
B.
a+b -x+y =- a+b x+y
C.
a+b -x+y =- a+b x-y
D.
-a+b x-y =- a+b x-y
【简答题】计算y=Asin(Bx+C)，y=Acosx，y=tanx，y=x k (k=1，2，…)的导数。
【单选题】下列函数一定是关于x的二次函数的是 [ ]
A.
y=ax+bx+c
B.
y=x 2 +bx+c
C.
y=（a 2 +a）x 2 +bx+c
D.
y=（a 2 -a）x 2 +bx+c
【单选题】听力原文：M: The visiting economist is speaking tonight. But Dr. Smith doesn't seem to think much of him. W: That's because Dr. Smith comes from an entirely different school of thought. Q: What do we learn...
A.
The visiting economist has given several lectures.
B.
The guest lecturer's opinion is different from Dr. Smith's.
C.
Dr. Smith and the guest speaker were schoolmates.
D.
Dr. Smith invited the economist to visit their college.
【单选题】微分方程y"+y=x 2 +1+sinx的特解形式可设为( )．
A.
y * =ax 2 +bx+c+x(Asinx+Bcosx)
B.
y*=x(ax 2 +bx+c+Asinx+Bcosx)
C.
y * =ax 2 +bx+c+Asinx
D.
y * =ax 2 +bx+c+Acosx
【简答题】函数y=bx＋1(b≠0)与y=ax2＋bx＋1(a≠0)的图象可能是
相关题目：
【单选题】下列函数一定是关于x的二次函数的是 [ ]
A.
y=ax+bx+c
B.
y=x 2 +bx+c
C.
y=（a 2 +a）x 2 +bx+c
D.
y=（a 2 -a）x 2 +bx+c
参考解析：
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