当一条直线垂直于投影面时,在该投影面上反映()A、实形性 B、类似性 C、积聚性

题型:单项选择题

问题:

当一条直线垂直于投影面时,在该投影面上反映()

A、实形性

B、类似性

C、积聚性

考点:机械工程机械制图机械制图题库
题型:单项选择题

同一种类应纳税凭证,需频繁贴花的,纳税人可以根据实际情况自行决定是否采用按期汇总缴纳印花税的方式。汇总缴纳的期限为1个月。( )

题型:单项选择题

已知某债券在发行时附有可赎回条款,赎回价格为P0,以下关于折(溢)价债券的价格变动与利率之间的关系的曲线符合可赎回债券的基本特征的是( )。

题型:单项选择题

阅读理解。

     Senior citizens are permitted to travel cheaply on a bus if they have a special card. Women may

get the card when they are sixty.

     Mrs. Mathews lived in the country but she went into town once a week to buy food and other

things for the house, and she usually went by bus. She always had to pay the full price for her ride.

     Then she reached the age of sixty and got her senior citizen's card, but when she used it for the

first time on the bus, it made her feel very old.

     The bus driver had often seen her traveling on the bus before, and he noticed that she was not

feeling happy, so after she had paid her money, he winkled(眨眼) at her and whispered. "Don't

forget to give your mother's card back to her when you see her again." Mrs. Mathews was very

happy when she heard this.

1. Who can get a special card when they are sixty?

A. Senior citizens

B. Old people.

C. Women.

D. Men

2. Before she was sixty, Mrs. Mathews used to

A. live alone

B. go to town once a month

C. go to town by car

D. pay the full price for her ride

3. Why was Mrs. Mathews very happy when she heard the driver's words? Because she _______.

A. was traveling cheaply

B. loved her mother deeply

C. was still under sixty

D. she thought she looked much younger than she really was

4. From the passage we know the bus driver___________.

A. had poor eyesight

B. was not polite to old people

C. was a kind-hearted man

D. mistook her for a young lady.

题型:单项选择题

既能活血调经,又能利水的药物是()

A.丹参

B.益母草

C.王不留行

D.牛膝

E.泽兰

题型:单项选择题

若要求三相负载中各相互不影响,负载应接成()

A.三角形

B.星形有中线

C.星形无中线

D.三角形或星形有

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