在白天，移动停车信号是（）。A、绿色圆牌 B、红色圆牌 C、黄色方牌 D、红色方牌

FBITC产品介绍法中的“I”代表的含义为（）。

A.冲击式介绍

B.产品功能

C.给客户带来的利益

D.竞品对比

室间隔缺损继发肺动脉高压，下列能最早称为艾森门格综合征的是（）

A.当室水平发生右向左分流时

B.当右心室扩大并室壁增厚时

C.当室水平发生双向分流时

D.当右心房显著扩大时

E.当室水平发生左向右分流时

How Many Lies Do the Children Tell You?

Mothers who feel their children don’t appreciate them can add another complaint to the list: half the time, their children are lying to them. A study designed to expose the truth about lying shows that undergraduates lie to their mothers in 46% of their conversations. Still, mums should feel better than-total strangers, who are told lies an astonishing 77% of the time.

Bella DePaulo and a team of psychologists from the University of Virginia, Charlottesville, asked 77 undergraduates to keep a record of all their conversations for a week, and write down whether they lied at any time. DePaulo named lying broadly, as “when you intentionally try to mislead someone”, so she would catch the smallest of lies.

The students told an average of two lies a day. They said they had been studying when they had been out drinking. One told his parents that a textbook cost $50 rather than $20 so that they would send him extra money. Female students constantly told their plain-looking roommates that they were pretty. “They are everyday lies,” says DePaulo.

DePaulo and her colleagues conclude that people tend to tell fewer lies to those they feel closest to. College students lied to their best friends 28% of the time but lied to acquaintances 48% of the time. In close relationships, people were more likely to tell “kind-hearted” lies, designed to protect feelings, rather than self-serving lies.

DePaulo finds that unmarried lovers can expect less honesty than best friends because of the insecurity that comes with romance.

Mothers can take heart from one other finding. They may have been lied to, but at least their children talked to them. The students were recorded telling few lies to their fathers because they had little interaction with them.

小题1: Female students lied to their roommates to ________.

A．get money from them

B．offer them the services

C．gain more security

D．make them happy小题2: According to the passage, college students told fewer lies to ________.

A．mothers

B．best friends

C．acquaintances

D．romantic partners小题3: Which of the following statements is correct ?

A．Undergraduates lie to their mothers in 77% of their conversations.

B．Strangers become very annoyed when children tell lies to them.

C．Compared with mothers, students’ fathers are told fewer lies.

D．Best friends can expect more insecurity than unmarried lovers.小题4:What is the purpose of this article ?

A．To present a fact.

B．To argue an idea.

C．To tell a story.

D．To explain a theory.

几种常见晶体的物理性质见下表，请完成表中空格

晶 体	氯化钠	氯化钡	金刚石	二氧化硅	硫	白磷	钠	钨
熔点 0C	801	1560	3550	1723	112.8	44.1	97.8	3410
硬 度	较 硬	较 硬	很 硬	硬 脆	脆	软	柔 软	硬
晶体类 型

（1）金刚石的同素异形体是______

（2）上述晶体中熔化成液态时无需破坏化学键的是______，从熔点、硬度看规律性最差的是______，晶体中存在分子的是______（本小题各空匀填写晶体类别）

（3）金刚石和二氧化硅硬度大、熔点高的主要是因为晶体中的原子以共价键结合成______．二氧化硅和二氧化碳都是ⅣA族元素的氧化物但它们的物理性质相差很大，这主要是因为它们的______不同．由分子构成的物质，影响其熔沸点和溶解度的重要因素之一是______．

简述回旋曲式结构特点。