问题 单项选择题 单选题

在规定的条件下和规定的时间内,设备的故障总数与未发生故障的设备数之比称为()。

A.故障率

B.瞬时故障率

C.不可靠度

D.平均故障率

答案

参考答案:D

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

单项选择题