3.16 BJ 披露点JJ

suconnan

应该是可以的……

呵呵，不过不重要啦！都有了好的结果，过程就无所谓啦～

cmahongkong

30. GWD21-Q30:

In the past, most children who went sledding in the winter snow in Verland used wooden sleds with runners and steering bars.  Ten years ago, smooth plastic sleds became popular; they go faster than wooden sleds but are harder to steer and slow.  The concern that plastic sleds are more dangerous is clearly borne out by the fact that the number of children injured while sledding was much higher last winter than it was ten years ago.

Which of the following, if true in Verland, most seriously undermines the force of the evidence cited?C

 

1. A few children still use traditional wooden sleds.

2. Very few children wear any kind of protective gear, such as helmets, while sledding.

3. Plastic sleds can be used in a much wider variety of snow conditions than wooden sleds can.

4. Most sledding injuries occur when a sled collides with a tree, a rock, or, another sled.

5. Because the traditional wooden sled can carry more than one rider, an accident involving a wooden sled can result in several children being injured.

xgh9186来clarify下是不是这个题目,是说把正确的选项换了,那正确的选什么? 当然看见战友710+高兴啊,沾点喜气,晕,看见现在的学生都这么厉害,我就不时的在想 where was I doing when I still in the college.

楼主理工科大,是中科大哦.西西

xgh9186

就是这题，出现在7-8左右的样子，答案c变了，忘了改成什么了，其他错误选项没变

hang13

那是不是还选C呢？

xgh9186

不是，选项位置还稍微变了下，最后选D了

cindysunjing

lz哪里能下载到prep语法笔记啊？给个链接好吗？我找到一个繁体字版的，实在看着费劲啊。。。谢了

wangxiaoqing

数学6就这个图，问A-B距离是多少？

  (1)x=一个数

  (2)y=一个数
选A

I think you need both x and y to figure out the distance,

so answer is C?

wangxiaoqing

2一个数列 S0,S1......Sn......      其中S0=0 问S10=?

(1)任意n>1(要不就是任意n>0) ,Sn比Sn-1前面的数大i (角标也记不清楚了,反正意思就是公差为i的等差数列)

(2) 任意n>1        Sn-1  +   Sn=i^2

I think the answer should be D

wangxiaoqing

5 n is an integer, p(n)定义为n所有位上的数乘积 问哪个正确？

1 p(10n)=p(n)

2 p(n+1)>p(n)

3 p(2n)>2p(n)这个记不清了

当时我只看了下前两个都不对，第三个没算，选项里没有只有3对的项

答案NONE,好像是A选项

the answer should be none

wangxiaoqing

4去年由于财政紧张，拨款修桥只给了85%的能把桥完全修理的费用，假设费用没有增长，今年又要修，说今年的总费用(x)包括去年少拨的（a）和今年的费用(b)，问今年拨给修桥的费用应该比去年增长多少？

（1）去年的完全修复费用是（一个数忘了）

（2）今年修桥的费用b（注意不是总费用x）比去年的增长了30%（数字不确定）

(1): do not know (b)

(2): (b)=1.3(last year allocated)

     (a)= 0.15(last year allocated)

     (b)+(a)=1.45(last year allocated)

      so the increase is 45%.

so B is fine