问题 多项选择题

下列运输机械中能用于中短距离需倾斜给料的机械有()。

A.带式输送机

B.刮板式输送机

C.埋刮板式输送机

D.斗式提升机

E.辊子输送机

答案

参考答案:A, B, C

解析:带式输送机应用最广,对各种距离、角度的输送都能适应;刮板式输送机适合中、短距离内水平或倾斜输送散料,长度灵活;埋刮板式输送机适合中、短距离,倾斜或垂直,粉状或小粒度材料,密闭性好;斗式提升机适用于中、短距离内垂直提升较小料度的散料,易于密闭;辊子输送机适用于短距离,输送件货如钢锭、零件、木材箱件等。

阅读理解

It is the last lesson before the winter vacation. The students are very happy. Their English teacher is very happy, too. Their teacher plays some nice games with them. She sings some nice songs with them, and then she remembers something and goes to the blackboard and writes “SMILES” on it. “This is the longest word in English,” she says to the class. All the students laugh, and then one girl stands up and asks, “Why is it the longest word in English?”

The teacher says nothing for a few seconds(秒). Then she smiles(微笑) and says, “Because there is a mile between the first letter and the last one.”

根据短文内容选择正确答案。

( ) 1. Why were the English teacher and the students very happy? Because       .

A. it was the last day before the vacation.

B.It was the last lesson before the vacation.

C. The teacher sang some nice songs with the students.

( ) 2. How did they spend the last lesson?

A. they played some nice games.        

B. They sang some nice songs.

C. Both A and B.

( ) 3. What did the teacher write on the blackboard?

A. Smiles             B. Smells          C. Slows

( ) 4. A girl stood up and asked the teacher,  “             ?”

A. Why is the word so long            

B. Why is it the longest word

C. Why did all the students laugh

( ) 5. The word “SMILES”is one of the longest words in English because        .

A. there is a “mile”between the first “s” and last one   

B. it has many letters

C. there are two “s” in the word

单项选择题