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单项选择题

以下哪个不是炉外精炼的手段？
A 渣洗
B 真空
C 脱氧
D 加热

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单项选择题
NX软件对操作系统的要求（    ）。
A、32位XP系统
B、32位WIN7系统
C、64位XP系统
D、64位WIN7/10系统
未知题型
? You are personal assistant to the president of an American trading company, DNL International. The president leaves you a memo.
To: Mack From: President
Subject: Stopping Rent Date: April 25, 2003
It is decided at our monthly meeting that we are going to relocate our office this May and have to stop
renting the present onE.Please send a fax to the Administration Department, telling them about our
decision and explaining the reason for our relocation.
? Send a fax to the Administration Manager of your present office building:
? telling him your decision of stop renting their office
? explaining the reason for the relocation
? expressing your thanks for their full support during your rent
? asking him to contact you if he has any questions.
? Write 60-80 words.
? Write on your Answer Sheet.
判断题
熏蒸剂是指药剂经气体状态通过昆虫的呼吸系统进入虫体，使之中毒死亡的药剂，一般用于大棚、温室等密闭空间。
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