中间储仓式制粉系统与直吹式制粉系统相比，由于前者系统复杂、庞大，故其运行可靠性比直吹

中学生小刚在放学回家的路上，看到本班同学小江被几个身强力壮的社会青年拦住搜身。小刚未加思索，立即上前替小江打抱不平，结果两人都被打成重伤，住进了医院。

请你对上述材料进行简要概括

假如你是李华， 收到笔友Mary的来信如下， 请你针对信中Mary遇到的问题进行回复， 给她提出建议。

Dear Li Hua ,

How are you ?

I am having trouble with my desk mate Jenny at the moment . Last week , we had a maths test .The test was important and everyone had prepared for it except Jenny .

During the test , she asked me to help her. I refused and didn’t let her copy from my paper .As a result , she failed the test .She is angry with me and hasn’t talked to me since then . Now I don’t know how to deal with this problem .Can you give me some advice ?

I’m looking forward to your reply .

Yours

Mary

写作要点：

给Jenny 写信，告诉她诚实的重要性及作弊的坏处。

帮助她学习数学，使她对学习数学充满信心。

如果她的英语比你的好，可以让她帮助你学英语，因为互帮互助可以加深（deepen ）友谊。

词数要求：100左右（开头已给出， 不计入总词数）

Dear Mary，

I’m sorry you are having trouble with your friend.

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Best wishes . 

Yours

LiHua

附子回阳救逆常配伍的药物是：（）

A.人参

B.肉桂

C.鹿茸

D.干姜

E.生姜

现代生物技术是以( )的建立为标志的。

A．DNA重组技术
B．细胞工程
C．酶工程
D．发酵工程

导体屏蔽料为何要进行烘干处理？