驾驶机动车下坡使用缓速器可以完全代替行车制动装置。

题型:判断题

问题:

驾驶机动车下坡使用缓速器可以完全代替行车制动装置。

考点:机动车驾驶人考试安全文明驾驶常识考试(科目三科目四)货车
题型:判断题

羟丁酸钠毒性作用的特点是()。

A.毒性低

B.明显抑制呼吸

C.明显抑制循环

D.有肝毒性

E.有肾毒性

题型:判断题

阅读理解(共两节,第一节4小题,第二节1小题;每小题2分,满分10分)

阅读下面短文,并根据短文后的要求答题。

__ 1 ___. This was not because the woods and fields were always far away, but because they were too far from the city to permit people to make a day trip between morning and nightfall.

In 1970, a young German school master had an idea which changed this situation. He decided to turn his little school into a dormitory (宿舍楼) for the summer holidays. Anyone who brought his sleeping bag and cooking equipment along could stay there for a very small quantity of money. The idea was a success. A few years later, the school house was much too small to hold the many young people who wanted to stay there. __ 2 ___  . This was the first hostel. (青年招待所) .

Today, young students and workers of every country can meet in the hostel and get to know each other. When young people arrive at the hostel, they have only to show their cards of membership in a hostel organization in their own country.    ___3____  .

Often, at the evening meal, a group of boys and girls from various parts of the country or world will happen to meet at the same hostel. They may put their food together and prepare a dinner with many kinds of dishes. Sometimes a program will be organized after the meal with dances, songs, or short talks followed by a question period. __ 4 ___. For this reason, a few weeks spent “hosteling” can be just as useful a part of one’s education as classes in school.

第一节 根据短文内容,从A、B、C、D、E中选出最适合放入短文空缺处的选项,并将序号及相应答案写在答题纸上。选项中有一项是多余选项。

A. One can learn a lot about other places, just by meeting people from those places.

B. As a result, a dormitory was set up in an old castle nearby.

C. For years, children in the industrial areas of Europe seldom left their cities to see the beauties of the countryside.

D. More and more young people went to the hostel for summer holidays.

E. This card will permit them to stay in a hostel all over the world for very low prices.

第二节 根据短文所给的信息回答问题,并将序号及相应答案写在答题纸上。

5. According to the passage, why time spent in hostels can be useful or helpful to young people?

题型:判断题

下列说法正确的是

A.将氯化镁溶液直接蒸发至干,可获得纯净的无水MgCl2固体

B.二氧化硅不与任何酸反应,可用石英制造耐酸容器

C.用KSCN溶液检验硫酸亚铁溶液是否氧化变质

D.用苯萃取溴的四氯化碳溶液中的溴

题型:判断题

有一包固体物质,可能是由H2SO4、CaCO3、Fe(NO33、Ba(OH)2、NaCl、MgCl2中的一种或几种组成.为确定其成分,进行如下实验:

①取样品放入小烧杯中,加水充分溶解,静置,有白色沉淀.

②再向小烧杯中逐滴加入稀硝酸,开始无现象,后沉淀逐渐溶解,最后沉淀不再减少.试推断:

(1)这包固体中一定不存在的物质是______,可能存在的物质是______.

(2)写出①中发生的反应方程式:______;______.

题型:判断题

根据《早期推定混凝土强度试验方法标准》,早期推定标准养护28天混凝土抗压强度方法有:沸水法、热水法80℃、温水法55℃、砂浆促凝压蒸法、()。

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