空气冲击波中状态的突然变化，最显著地表现在（）上。A、温度 B、压力 C、声音 D、时间

    In England, we look forward to our birthdays for 364 days a year!

We invite special people to celebrate it with us.

The Presents

Presents are opened as soon as the children are awake. They can’t wait for the birthday cake later in the day!

The Cards

Friends and family send birthday cards. Sending birthday cards is a custom (风俗) that began in England about 100 years ago.

The Party

The birthday child will have a party to which friends and family are invited. Visitors to the party bring presents for the birthday child. The children play games such as musical chairs and pass the parcel (包裹).

The Cake

The birthday cake is decorated on a theme (主题). A candle for each year is lit and placed on top and the child blows out the candles making a wish. We don’t put objects inside the cake as stated on many websites.

The Bumps (碰撞)

It used to be traditional for the birthday child to have the bumps. Friends would hold the child by the legs and under the arms and lift the child up and down bumping them gently on the ground. The number of bumps given is the age of the child plus one for extra good luck. As this can be dangerous, clapping (拍手) is often done instead.

The Sweets

Some children do take sweets to school to share with their classmates on their birthdays.

小题1: In England, the birthday present is opened _____.

A．before the child wakes up

B．immediately after the child wakes up

C．as soon as the child gets up

D．during the birthday party小题2: If Alice is celebrating her 7th birthday, how many bumps will she be given?

A．Six.

B．Seven.

C．Eight.

D．Nine.小题3: Which of the following facts about birthdays in England is NOT true?

A．All the children will receive birthday cards on their birthdays.

B．Clapping is often done for the birthday child.

C．Objects meaning good luck are usually placed inside the birthday cake.

D．Nowadays children may share sweets with their classmates on their birthdays.小题4: What would be the best title for this passage?

A．How birthdays are celebrated in the world

B．Where to hold an English birthday party

C．What to send when invited to a child’s birthday

D．How English children celebrate their birthdays

设集合P={3，log₂a}，Q={a，b}，若P∩Q={0}，则P∪Q=[ ]

A． {3，0}

B． {3，0，1}

C． {3，0，2}

D． {3，0，1，2}

下列关于奔腾芯片技术的叙述中，正确的是________。

A．超标量技术的特点是提高主频、细化流水

B．超流水线技术的特点是内置多条流水线

C．哈佛结构是把指令与数据混合存储

D．分支预测能动态预测程序分支的转移

[问题2]
网络安全技术分为几类

促使战争突破地域条件的限制，能够在世界范围内有效的指挥战争的发明是（）

A.新式武器的相继问世

B.新交通手段的出现

C.新通讯工具的出现

D.传统武器的改进