下列哪项不是浙贝母的主治病证（） A.风热咳嗽 B.风寒咳嗽 C.痰热咳嗽 D.瘰疬

洛阳牡丹天下闻名，牡丹花开始满城飘香，从分子的角度解释，是因为______．牡丹花可观赏，亦可食用，同水果、蔬菜一样，它能为人体提供的主要营养元素是______．

假如英语课上老师要求同桌之间交换修改作文，请你修改你同桌的以下作文，文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加，删除或修改。

增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1．每处错误及其修改均仅限一词；

2．只允许修改10处，多者（从第11处起）不计分。

My school has taken on a new look since it moved into a new

place.It is quite different of the old one.It used to be only one

classroom building and the playground is not large enough for all the

students to have sports on.Sometimes we had to practice run along

the streets outside.The teaching conditions were even worst.Our

teachers used to teach with only a blackboard and chalk and the

experiments could only be done in the classroom.But now besides the

classroom building,a modern lab building has also put into use,which

all kinds of experiments can be done.We have not only a large

playground and also a gym.Classes can be given by the help of

computers and multimedia.What are great changes!I feel proud of my

school.

PCM信号在传输中为什么使用HDB3码，而不是用NRZ码？

水磨石踢脚板在抹完罩面石粒浆后，在常温下待______后就可人工进行磨面。头遍用粗砂轮石，______，应将石粒磨平，阴阳角磨圆。擦头遍：素浆，养护d，用2号砂轮石磨第二遍。

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