中小企业闲置资金理财主要投资于（） A.高收益的产品 B.低风险性的产品 C.高流动

以下选项中物体的质量最接近50g的是（   ）

A．一枚1元硬币

B．一只鸡蛋　

C．一只大公鸡　

D．一本八年级下册物理书

矿产资源开发的合理性分析是( )的一个重要任务。

A．项目决策与建设

B．项目评价与建设

C．项目建设与计划

D．项目决策与评价

X射线分析证明一个完整的DNA螺旋延伸长度为（）。

Sitting across from his teacher, Edgar Martinez repeated the word he couldn't quite pronounce: "situation"．The teacher, LisaMojsin, hired to help Martinez reduce his accent, said the word slowly; "Sit-chew-a-shun．" "I wish he had taught me this 20 years ago．" said Martinez, 37, who comes from Mexico and lives in Los Angeles．In private tutoring classes throughout the nation, immigrants are focused on sounding more American．

Accent reduction classes have been around for years, but experts say．"As our workforce becomes more and more global, these classes are becoming more and more popular．" Private tutors said they answer calls almost daily from students, when just a few years ago the phones rang only occasionally．Author Amy Gillett said that sales of her book and CD set, "Speak English Like an American", have increased three times in the last few years．Judy Ravin, President of the Accent Reduction Institute, said she has hundreds of students who follow her program, "Lose Your Accent in 28 Days"．

Though there is a general tolerance for diversity, experts said, reality has made some immigrants who sound different feel unwelcome．If someone speaks with an accent associated with an Asian language, they may work as engineers or computer scientists．If someone speaks with certain Spanish accents, people may think they are recent immigrants working in landscaping or the hospitality industry （招待性行业）．A French accent gives images of romance．An Australian accent brings to mind adventure and fun．

Accent reduction students said they are aware of how they sound and whether their accents limit their job opportunities or spoil their social lives．Jennie Lo, aged 43, said her accent has been an embarrassment．Sometimes people couldn't even understand her when she said her name．While in college in Oklahoma, Lo said she didn't make many friends, tearing that no one could make out her words．Lo is now taking accent reduction classes and hopes to apply for a manager position at work．"I just want to feel good about myself," she said．"If I really work hard, if I practice every day, I can't be perfect．But I can be better．"

小题1:In the whole passage, the first paragraph serves as a（n） _____．

A．introduction

B．comment

C．explanation

D．background小题2:What does the author want to express in the second paragraph?

A．The effect that popular accent reduction classes have．

B．The fact that accent reduction classes become popular．

C．The steps how accent reduction classes become popular．

D．The reasons why accent reduction classes become popular．小题3:If someone speaks with certain Asian accents, people may think _____．

A．they are romantic

B．they are hospitality workers

C．they are computer scientists

D．they love adventure and fun小题4:What is Jennie Lo's attitude towards her taking accent reduction classes?

A．Confident．

B．Helpless．

C．Proud．

D．Anxious．

关于大明宫的修建历史，下面说法正确的是：（）

A.由唐高祖李渊为自己修建

B.由唐太宗李世民为太上皇李渊修建

C.始建于唐太宗李世民时期，由唐高宗李治继续修建至完工

D.由武则天为自己修建