已知函数f(x)=3x+2x-1,则lim△x→0f(1-3△x)-f(1)△x

题型:选择题

问题:

已知函数f(x)=
3x
+2x-1
,则
lim
△x→0
f(1-3△x)-f(1)
△x
的值为(  )
A.
7
3
B.-
7
3
C.7D.-7
考点:导数的运算
题型:选择题

阅读短文,根据要求完成下面各小题。

Each year, many Chinese people go abroad because of all kinds of reasons. They are becoming younger and younger year by year. Even some Chinese parents send their children to foreign countries when they are only in a middle school. They think their children can get a wider view, less academic(学业) competition or family honor. But life can be hard for young people there. At first, they have to face the culture differences and language problems. However, these are not always the most difficult things to overcome(克服). To most children, controlling(管理) themselves well is a big challenge when studying alone in a strange country.

Yu Yang, a 15-year-old student from Guangdong Province studies in a high school in Toronto, Canada. 小题3To his surprise, his teachers there seldom push students to study hard. And usually there isn’t too much homework. Students have lots of free time to do some activities. Some of his friends spend their whole year’s money in the first two months of the new term. So they have to ask their parents for some more money.

On the one hand, studying abroad can help students learn foreign languages quickly and open up their eyes, but on the other hand, some children may feel lonely, become bad, lose themselves, etc. Many provlems may happen to them. These are different from their original thoughts.  小题4So parents should think them over before their children go abroad.

(一)根据短文内容简要回答问题。

小题1:Why do Chinese parents send their children abroad?

                                                                          

小题2:What do the students have to face in foreign countries at first?

                                                                          

(二)将短文中划线的句子译成汉语。

小题3:                                                                   

小题4:                                                                   

(三)请给短文拟一个适当的标题。

小题5:                                                                   

题型:选择题

按要求把句子中有关部分用“_______”画出来。

(1)画出表示连续动作的两个词。

   李老师推开门走进教室。

(2)画出指同一事件的两个词。

   班长李刚是我的好朋友。

(3)画出表示肯定的词语。

   星期天我们不能不去看排球比赛。

(4)画出关联词语。

   我们与其说从明天起该好好学习,不如从今天就开始刻苦努力。

(5)画出表示转折关系的标点符号。

   训练动物是很有意思的——猴子的动作多么像人啊!

题型:选择题

一位正在接受糖皮质激素治疗的ITP患者,突然出现脑出血,下列紧急处理措施中不适当的是()

A.血小板输注

B.静脉注射丙种球蛋白

C.血浆置换

D.大剂量甲泼尼龙静脉注射

E.氨肽素口服

题型:选择题

阅读下面的诗歌,然后回答问题。(8分)

人生易老天难老,岁岁重阳,今又重阳,战地黄花分外香。

一年一度秋风劲,不似春光,胜似春光,寥廓江天万里霜。

(1)  这首词的哪一个字写出了秋天怎样的景色特征?这个字使你联想到《沁园春·长沙》怎样的景象?(4分)

(2)这首词在满腔热情地歌颂革命形势的同时,也流露出对斗争的艰难曲折的感慨。词中哪个短语流露了这种感慨?请作简要赏析。(4分)

题型:选择题

以下属于电子地图用处的是()。

A.在地图上发布信息

B.了解其他信息

C.查询天气

更多题库