在世界一级方程式锦标赛中,赛车在水平路面上转弯时,常常在弯道上冲出跑道,则以下说

题型:选择题

问题:

在世界一级方程式锦标赛中,赛车在水平路面上转弯时,常常在弯道上冲出跑道,则以下说法中正确的是(  )

A.由于赛车行驶到弯道时,运动员未能及时转动方向盘造成赛车冲出跑道

B.由于赛车行驶到弯道时,没有及时加速造成赛车冲出跑道

C.由于赛车行驶到弯道时,没有及时减速造成赛车冲出跑道

D.由公式可知,弯道半径越大,越容易冲出跑道

考点:匀速圆周运动
题型:选择题

阅读下面电子邮件,然后选择正确答案。

Dear Peter,

     My name is Frank. I am from America. Here is a picture of my class. We are in Class One, Grade

Seven. You can see my friends in the picture. Jimmy likes to play basketball. He likes to eat apples and

French fries. Helen likes math. Her favourite food is hamburgers. Sandra doesn't like math. But she can

speak French (法语). She likes ping-pong. Sally is a black (黑人的) girl. She likes to swim. She likes to

eat ice cream. I like math too. Can you find (寻找) me? I like to eat bananas. Maria likes computer very

much. She plays computer games very well. Nick is fun. He can play football. He likes strawberries best. 

     Can you send me a picture of your class?

                                                                                                                  Frank                              

1. How many friends does Frank have in his class?

A. Seven.          

B. Six.          

C. Five.              

D. Eight.

2. _____ like sports.

A. Jimmy, Sandra and I

B. Maria, Nick and Jimmy  

C. Sally, Nick, Jimmy and Sandra      

D. Jimmy, Sandra and Helen

3. —Who like math?

    —_____ and _____do.

A. Helen; Frank    

B. Sandra; Peter    

C. Helen; Sandra    

D. Jimmy ;Sandra

4. This is an e-mail from _____ to _____.

A. Nick; Jimmy    

B. Frank; Peter    

C. Peter; Frank      

D. Maria; Peter

5. —Where is Frank from?

    —He is from _____. 

A. China          

B. the USA        

C. England          

D. Canada

题型:选择题

“如今有个趋势,人们怀念她的民主制度,并将其视为所有现代民主制度的源头”(英国史学家约翰•索利语)。这里的“她”是指()

A、罗马帝国

B、雅典

C、东罗马帝国

D、斯巴达

题型:选择题

下列各句中,加粗词语使用恰当的一句是 [ ]

A.饮誉海内外的四川本土诗人流沙河在四川大学举行了专题讲座,他旁征博引,高谈阔论,从诗人先天的资质讲到后天的培养,从写景言情讲到咏物论史,从立意构思讲到谋篇炼句。

B.近年来,电子商务在国内的发展较为迅速,激发了不少潜在消费市场,而这部分市场份额很有可能成为未来零售业巨头间争夺市场并决战胜负的关键,从而沃尔玛布局这一领域具有必要性。

C.为了尽快丰富故宫博物院绘画馆的收藏,徐邦达经常往返各地,悉心查访,短短几年时间,便收集到无数件古书画珍品,使故宫绘画馆藏品初具规模。

D.法国研究人员报告,虽然要求全体医务人员勤洗手,避免院内传染,但只要有一名医生、护士或技术人员的手不干净,就可使所有努力付诸东流

题型:选择题

患者男,36岁,二个月前因外伤一上前牙脱落口腔检查:左上1缺失,间隙正常,牙槽嵴无明显吸收。右上1牙冠1/2缺损.已露髓,探稍敏感,叩诊阴性,无松动。左上2牙冠良好,叩诊阴性,无松动。上下前牙牙龈轻度红肿,易出血,可见菌斑及牙石。余牙未见异常。

下列对桩核中桩的描述正确的是()

A.桩末端距根尖孔3~5mm

B.桩末端距根尖孔1~2mm

C.桩可增强根管封闭

D.桩的直径一般为根横径的1/2

E.桩的固位力主要取决于粘固力

题型:选择题

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