【判断题】除某些特定要求外,使用胶头滴管加液时,不能伸入容器,更不能接触容器。
【单选题】Why won’t Alan worry even if it rains?
A.
Because he heardthe weather forecast.
B.
Because he thinks it’ll only be a short shower that cools things off a little.
C.
He prefers a short shower.
D.
He is expecting a gentle breeze to cool things off.
【简答题】已知函数f(x)= 1 3 x 3 + 1 2 (a-1)x 2 +ax(a∈R) (1)若f(x)在x=2处取得极值,求f(x)的单调递增区间; (2)若f(x)在区间(0,1)内有极大值和极小值,求实数a的取值范围.
【简答题】Choose the proper word to fill in each blank from the word given below saw consider off looking If idea small out trouble drive legs about “And what _1__ it won’t go in the car? The cl...
【多选题】下列人员中,连续任职不得超过两届的是 ( )
【简答题】设 f(x)= x 3 - 3 2 (a+1) x 2 +3ax+1 . (Ⅰ)若函数f(x)在区间(1,4)内单调递减,求a的取值范围; (Ⅱ)若函数f(x)在x=a处取得极小值是1,求a的值,并说明在区间(1,4)内函数f(x)的单调性.
【简答题】选用方框内合适的短语并用其正确形式填空(每个短语限用一次)。 A if not, if only, even if, only if 1. she’d listen to what he’s saying, I’m sure she could work it out. 2. We’ll have the party in the garden if the weather’s good. , i...
【简答题】已知函数f(x)=x 3 +ax+b. (1)若f(x)在x=0处取得极值为-2,求a、b的值; (2)若f(x)在(1,+∞)上是增函数,求实数a的取值范围.
【简答题】已知函数f(x)=x 3 +3(a-1)x 2 -12ax+b在x=x 1 处取得极大值M,在x=x 2 处取得极小值N, (1)若f(x)的图象在其与y轴的交点处的切线方程是24x-y-10=0,求x 1 ,x 2 ,M,N的值 (2)若f(1)>f(2),且x 2 -x 1 =4,b=10求f(x)的单调区间及M,N的值.