土的液相

Where is my pen?

Tommy is in the classroom, and cannot find his pen--- he needs to write down his homework! The teacher helps him to look for(寻找) it.

“What’s the matter, Tommy?” says the teacher.

“I can’t find my pen,” says Tommy.

It is Tommy’s favourite pen. But it is not in Tommy’s bag. Tommy looks in the computer room, but the pen is not there. He goes to the library. He can look if it is open, but it is closed!

Tommy’s teacher asks if it is in the dining hall, but Tommy doesn’t write in the dining hall. He doesn’t write in the gym, either. He goes to the science lab, but it is closed too.

“Is it in the classroom?” says Tommy’s teacher.

“No, it’s not there…” says Tommy.

“What’s that on your desk?” says his teacher.

“It’s my pen!” says Tommy.

小题1:What can’t Tommy find?

_____________________________________________

小题2: Is it in his bag?

_____________________________________________

小题3: Does Tommy write in the classroom?

_____________________________________________

小题4:Where is Tommy’s pen?

_____________________________________________

三相变压器额定容量为20kVA，额定电压为10/0.4kV，Y,y0联结，高压绕组匝数为3300匝，试求：

变压器高压侧和低压侧的额定电流.

企业应当按照“谁出口谁收汇、谁进口谁付汇”原则办理贸易外汇收支业务，包括以下情况（）。

A、代理进口、出口业务应当由代理方付汇、收汇。

B、代理进口业务项下，委托方可凭委托代理协议将外汇划转给代理方，也可由代理方购汇。

C、代理出口业务项下，代理方收汇后可凭委托代理协议将外汇划转给委托方，也可结汇将人民币划转给委托方。

D、捐赠项下进出口业务按国家有关规定执行。

下列Ⅰ，Ⅱ，Ⅲ是BSP方法的几个步骤：Ⅰ．识别数据类　　　　　　　　　　　　　Ⅱ．定义企业过程Ⅲ．定义信息总体结构　　在BSP研究中，这三项活动的正确顺序是()。

A．Ⅰ，Ⅱ和Ⅲ

B．Ⅱ，Ⅰ和Ⅲ

C．Ⅲ，Ⅰ和Ⅱ

D．Ⅲ，Ⅱ和Ⅰ

20世纪70年代以来，我国有黑热病发生的地区有（）

A.甘肃

B.四川

C.新疆

D.山西

E.湖南