某飘 幼苗
共回答了21个问题采纳率：90.5% 举报
1年前
静雅滴辛 幼苗
共回答了1个问题 举报
2626126 春芽
共回答了13个问题采纳率：76.9% 举报
回答问题
a lot of trees cut down ,this area has become desert
1年前5个回答
we must stop -------(cut)down the trees.cut是不是用原形
1年前1个回答
With more and more trees cut douwn,the inhabitants in the ra
#[34] With a number of trees cut down,______ soil is washed
___ more and more trees cut down,many animals are dying out.
People used to cut down lots of trees.(用now改写)
1年前3个回答
—I’m going to cut the big trees down..—What________? A．by B．
In the picture,all the trees have been cut down.句子中为什么加been
The pandas are in danger because people cut down trees.对beca
______ trees are cut down in the forests every year. A．Thous
We must _down too many trees.Aprevent people to cut Bprevent
1.i hope fewer trees in the world are cut down,
People should( )trees. A.be kept to cut B,be kent from cutti
too much trees have been cut this years.这个句子哪错了
_____(cut)dow trees is bad for our homes 是该填cut还是cutting?（请说
Thousand of trees are cut down in the forests every year 找出错
首字母填空Millions of trees are being cut down to make paper.If e
we____still,too many trees are still being cut down in USA
The girlis afraid of __(cut)down the young trees.动词填空
1年前6个回答
你能帮帮他们吗
（2010•东莞）在947后面添上三个不同的数字，组成一个能被2，3，5同时整除的最小的六位数，这个数
判断函数的奇偶性（1）f(x)＝x（2）f（x）=1/x²（3）f（x）=-3x+1（）f（x）=-3x²+2
已知等差数列｛an｝中,a3+a4+a5=a12,则a1+a2+···a6+a7=
用哪个形容词形容人口多?同上
用什么办法能把试剂硫酸杂质过滤去除
精彩回答
下列反应既是离子反应又是氧化还原反应的是 [ ]
如图所示，为一正在工作的理想变压器，原线圈匝数n1=600匝，副线圈匝数n2=120匝，C、D两点接在最大值为220√ 2 V的正弦交变电源上，电路中装有额定电流为2A的熔丝B，为使熔丝不超过额定电流，以下判断中正确的是（ ）
一个游泳池，长50米，宽30米，高1.8米．池内蓄水1.2米，夏季到了，要把池内的水排空换水，用水泵向外排水，每分钟排水2.5立方米，需要几小时排完？
氯化钙溶液中含有少量盐酸杂质，在没有指示剂又不能增加其他杂质的情况下除去杂质，最好选用（ ）
6分之1比3分之1=5分之1比x
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