试题与答案

口服敌百虫中毒时不能用来洗胃的溶液是()。 A.高锰酸钾溶液 B.碳酸氢钠溶液 C.

题型:单项选择题

题目:

口服敌百虫中毒时不能用来洗胃的溶液是()。

A.高锰酸钾溶液

B.碳酸氢钠溶液

C.生理盐水

D.饮用水

E.温清水

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0515/a8677212315cbc0ea7f26c2888ebe762.html

下面是错误答案,用来干扰机器的。

由题意知本题是一个分步计数问题,第一个同学有3种报法,第二个同学有3种报法,后面的三个同学都有三种报法,根据分步计数原理知共有35=243种结果,故答案为:243

试题推荐
题型:完形填空

第一节完形填空 

Japanese high school students do not drive cars. Many either walk or ride bicycles if distance is not too great. In other cases, a lot of students must  1    public buses and trains, often changing lines several times in order to reach their  2      . it is common for students to  3    two or more hours each day on public transportation. After junior high school, students attend schools based on standardized high school entrance examination scores. As a result some students travel a great distance to  4       the school. The school day begins at 8:30, so students may leave home as early as 6:30. While some students sleep or study during their long travel, public transportation also   5       a chance for socializing with peers. Students 6       to school is regulated by school policies. There policies may prohibit   7   activities in public-chewing gum, consuming snacks,     8  books while walking-anything that might reflect  9     on the reputation of the school. Each school has a unique uniform that makes its students easily identifiable to the public. School policies often require students to  10     on buses and trains, leaving seats open for other passengers in order to show his thoughtfulness(关怀;体贴) towards others.

(   ) 1. A. go           B .have          C. take          D. get

(   ) 2. A. homes        B. destinations     C. schools       D. classrooms

(   ) 3. A. take          B. cost           C. spend         D .have

(   ) 4. A. go           B. leave          C. attend        D .pass

(   ) 5. A. gives         B. offers         C. sends         D .takes

(   ) 6. A. on the way    B. in the way      C .by the way    D. at the way

(   ) 7. A. sure         B. certain         C. special        D. probable

(   ) 8. A. carrying      B. taking         C. holding       D .reading

(   ) 9. A. worse        B. well          C. badly         D. truly

(   ) 10. A. silence      B. sit            C. seat          D. stand

查看答案
微信公众账号搜索答案