一个人喝了少量酒后,血液中的酒精含量迅速上升到0.3mg/mL,在停止喝酒后,血

题型:填空题

问题:

一个人喝了少量酒后,血液中的酒精含量迅速上升到0.3mg/mL,在停止喝酒后,血液中的酒精含量以每小时25%的速度减少,为了保障交通安全,某地根据《道路交通安全法》规定:驾驶员血液中的酒精含量不得超过0.09 mg/mL,那么,一个喝了少量酒后的驾驶员,至少经过    小时,才能开车(精确到1小时).

考点:函数、映射的概念
题型:填空题

阅读下面短文,根据短文内容完成下列句子。

                                        Different school year in US and Cluna

    With the beginning of the new semester, we have to say goodbye to the summer holiday.  But do you

 know students in America start their semester earlier than we do?

    Most American schools have a total of about 180 days of teaching.  The fall semester goes from early

 September to mid-December, and the spring semester goes from early January to mid-June.

     In China, we have two semesters and each has about 20 weeks.  The US school year is about 20 days

  shorter than it is in China.

    In the US, school kids have a long summer vacation and a few breaks,  which are like China's Golden

 weeks. One is around Christmas, lasting about two weeks. Another is in February, for only one week. It

 can also be called "ski week", because some students go skiing during the break. And there is a

 one-week-long spring break.  It is in March or April, around Faster.

     Throughout the vear, there are also a few other holidays when students don't go to school, such as

 Thanksgiving Day.  This is similar to Mid-Autumn Festival in China.

     Now we can understand why American students start, school earlier than us at this time of year.

1. Spring semester in America is from _____ to _____.

2. Fall semester in American school year is from _____ to _____.

3. There are there breaks, there, One is _____ .another is one-week-long spririg break, either in _____.

4. There are a few holidays when students don't go to school, such as _____.

5. Thanksgiying Day in the USA is similar to _____ in China.

题型:填空题

       建国50多年来,各行各业都涌现出许许多多的杰出人物,正如毛 * * 在《沁园春·雪》中所写“                                                                                         。”

题型:填空题

引起产蛋鸡产蛋下降为主要致病特征的病毒是()

A.鸡传染性喉气管炎病毒

B.鸡马立克氏病毒

C.鸡痘病毒

D.鸡产蛋下降综合征病毒

E.新城疫病毒

题型:填空题

许多俗语,如果变换一个角度思考,就会使人产生另一种新的理解。请仿照示例,反说下面的俗语。(10分)

示例:酒香不怕巷子深

反说:深巷中的酒香,谁能闻得到?好酒也需要包装和宣传。在信息时代,我们不能消极等待一个偶然过客的发现。

(1)赶鸭子上架

                                                                           

 

                                                                              

(2)人心不足蛇吞象

                                                                             

题型:填空题

我国对农业实行社会主义改造的过渡性经济组织形式包括()

A.互助组

B.初级农业生产合作社

C.高级农业生产合作社

D.人民公社

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