建立存货合理保险储备的目的是( )。A．在进货延迟时保证供应 B．在过量使用存货时

仿照下面例句的修辞和格式，请你以“她”开头再补写1个句子。

　　春姑娘迈着轻盈的步子款款而行。她携着神奇的小花篮，把五彩的鲜花撒向山坡，撒向田野。她______________________________________。

The South Pole is a particular place on the earth.When people stand at the top of it looking around,they will find all directions face to north.No matter how they make their first step in which direction,they will always walk towards the north.That’s to say,only north and south exist there,neither east nor west exists.

At the top of the South Pole,any clock or watch keeps good time because all meridians（子午线） join there.All kinds of local time are completely suitable there.It is even difficult to distinguish（区别） New Year’s Eve from New Year’s Day.

The explorers and scientists from different countries always fix the time according to their own.Therefore the time by their watches was different when the people with different nationality gathered there.

The Winter Solstice（冬至日） is an important festival at the South Pole.It is always on June 21 or 22.This day is called Midwinter Festival,on which the daytime is the shortest in a year and the night the longest.All people at the South Pole extend greetings to each other and present gifts to each other.They usually give all kinds of celebrations.From that day on,the daytime will get longer day by day.

小题1:At the top of the South Pole,your watch will ________.

A．keep good time

B．be five minutes fast

C．stop

D．be ten minutes slow小题2:The Winter Solstice is an important festival ________.

A．in the world

B．at the South Pole

C．at the North Pole

D．in China小题3:On the Winter Solstice,________ is the shortest in a year.

A．the night

B．the noon

C．the morning

D．the daytime

酚多数是（）。

A、气体

B、液体

C、固体

D、都不对

网络计划中，总时差与局部时差的关系是( )。

A．局部时差总是小于总时差

B．局部时差等于总时差

C．局部时差不可能大于总时差

D．总时差是线路上各局部时差之和

关于电压比电桥下列叙述错误的是（）。

A.电压比电桥的准确度等级是比较高，通常是0.1%。

B.电压比电桥有两种工作原理，一是电阻线路电桥，另一是感应式的电压比桥。

C.感应式电压比电桥当电桥平衡时变压器的电压比应等于桥内标准电压互感器的电压比。

D.电压比电桥测量范围小。