问题
单项选择题
起落架收放所用的液压动力正常为（）
A.液压B系统
B.液压A系统
C.备用系统
D.以上全是
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
起落架收放所用的液压动力正常为（）
A.液压B系统
B.液压A系统
C.备用系统
D.以上全是
参考答案：B
| 阅读短文，选择正确答案。 | |
One day, his teacher asks (问), " Peter, What is six minus (减) six? " " Sorry (对不起), sir, I don't know (知道)." " Listen. Peter, there are six coins (硬币) in your bag, but there is a hole (洞) in your bag, too. All the coins fall out (掉出来). Now what is left (剩下的) in your bag? " the teacher asks. " The poor (破旧的) hole," answers (回答) Peter. | |
| 1. Peter is ____________ years old. | |
[ ] | |
| A. five B. six C. seven | |
| 2. All the coins fall out because (因为) ____________. | |
[ ] | |
| A. someone (某人) takes them away (拿走) B. the bag has a hole C. Peter uses (使用) the coins | |
| 3. Does Peter know what six minus six is? | |
[ ] | |
| A. Yes, he does. B. No, he doesn't. C. We don't know. | |
| 4. Is there a hole in Peter's bag? | |
[ ] | |
| A. Yes, there is. B. No, there isn't. C. Yes, it is. |