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【单选题】
随机游走序列的一阶差分是（ ）A.
平稳过程
B.
非平稳过程
C.
方差非齐次过程
D.
过差分过程
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反馈参考答案：
举一反三
【单选题】A talk on WTO _____ in our college next week. [ ]
A.
is given
B.
will be given
C.
has been given
D.
have been given
【单选题】____________, and you will find him very aggressive.
A.
Having a talk with Tom
B.
Given a talk with Tom
C.
One talk with Tom
D.
If you have a talk with Tom
【单选题】_______, I believe, and you will find the student is very outgoing.
A.
One talk with him
B.
Given a talk with him
C.
Having a talk with him
D.
If you have a talk with him
【简答题】已知抛物线 过点A(1，0)，顶点为B，且抛物线不经过第三象限。 （1）使用a、c表示b； （2）判断点B所在象限，并说明理由； （3）若直线 经过点B，且于该抛物线交于另一点C( ),求当x≥1时y 1 的取值范围。
【简答题】如图，已知直线l的解析式为 ，抛物线y = ax 2 ＋bx＋2经过点A（m，0），B（2，0），D 三点． （1）求抛物线的解析式及A点的坐标，并在图示坐标系中画出抛物线的大致图象； （2）已知点 P（x，y）为抛物线在第二象限部分上的一个动点，过点P作PE垂直x轴于点E, 延长PE与直线l交于点F，请你将四边形PAFB的面积S表示为点P的横坐标x的函数， 并求出S的最大值及S最大时点P的坐标；...
【单选题】________, I believe, and you will find him very outgoing.
A.
Having a talk with Tom
B.
Given a talk with Tom
C.
One talk with Tom
D.
If you have a talk with Tom
【多选题】视频中的精神分裂症患者都存在哪些症状和表现呢?( )
A.
被害妄想
B.
即使是在大街上的人和事都认为和自己有关,是在给自己某种暗示
C.
幻听,脑子里有很多声音在和自己说话
D.
自卑内向
【单选题】_____ I believe，and you will find him very capable．
A.
Having a talk with Tom
B.
Given a talk with Tom
C.
One more talk with Tom
D.
If you have a talk with Tom
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