初步拟定该齿轮的加工工艺路线。

某同学为了探究并联电路中干路的电流与各支路电流之间的关系，设计电路如图所示．

（1）当闭合开关了，该同学发现电流表A₁指针向“O”刻线左边偏转，则故障原因可能是什么？

（2）如闭合开关了，该同学还发现电流表A的指针向右偏转，超过了右边最大刻度值，那该怎么办？

（3）排除一切故障后，该同学分别记下电流表A、A₁、A₂示数，然后换上另外两个灯泡，再次计下三个电流表示数，两次记录的数据如下表：

	A的示数	A1的示数	A2的示数
第一次测量	0.8A	0.3A	0.5A
第二次测量	0.7A	0.4A	0.3A

根据上表的数据分析，可得出结论是______．

中学时代对男女同学间能否建立友情的正确认识是 [ ]

A．“男女授受不亲”，男女同学间不应有友情

B．男生女生性格、情感等方面各有不同，交往可以互为补充、健康成长

C．中学时代，男女生建立真挚友情是道德败坏的表现

D．男人是火，女人是水，水火不相容，男生女生不能交往

物业经营管理主要以（）为管理对象，强调策略性价值管理等特点，要求物业管理师具备房地产投资知识和选择投资区位的能力。

A.收益性物业

B.业主或投资者

C.服务性物业

D.综合性管理服务

在神经肌肉接头兴奋传递过程中，哪种离子对乙酰胆碱的释放最关键（）

A.钠离子

B.钾离子

C.氯离子

D.钙离子

E.镁离子

This interactive on-line program helps non-native writers of English improve or fine-tune (调整) their writing skills in English. Recommended for intermediate or advanced levels, this on-line language class targets common writing problems of ESL/EFL writers. Class participants will build more effective writing skills. Topics include the items listed below.

● Clear explanations of grammar rules in English.

● Examples of common errors.

● Interactive practice activities that give students immediate feedback on answers.

● Application activities to guide students in applying new skills.

A free on-line needs assessment is provided to give participants an immediate results analysis to help them decide if this program will meet their needs.

To register call (519) 594-5152.

For further information, call (519) 594-5907 and ask for Dr. Roberts.

Instructor: Kathy L. Hans, has been teaching in the field of English as a second language for more than 20 years. She has trained ESL teachers throughout California for the State Department of Education and authored Teaching Pronunciation in Context, a training text with videotapes for teachers.

The Interactive On-line Program The participants of this program: (46) of English

The aim of this on-line language class: to solve (47) of ESL/EFL writers

The number of program topics: (48)

The way to decide if this program will meet the participants’ need: free (49)

The length of Kathy L. Hans’s working experience, more than (50)

Choose the right word to fill in the following essay corresponds to the air（）