悬沙输沙率()测验要检查断面垂线、测点布置是否合理,数量是否符合规定,位置是否准确。
A.选点法
B.积深法
C.积时法
D.瞬时法
参考答案:A
阅读短文,选择正确的答案。
This is my new bedroom. There is a small shelf on the desk. Two end tables are near the bed and a photo
is over the bed. The chair is in front of the desk. Look at my shoes. They are under the bed. I clean my bedroom
on Sunday. I empty the trash every day. Mom says I'm a helpful boy.
1. What's on the desk?[ ]
A. A computer.
B. A closet.
C. A shelf.
2. The photo is .[ ]
A. Near the bed.
B. On the bed.
C. Over the bed.
3. What can you do every day?[ ]
A. I can clean my bedroom.
B. I can empty the trash.
C. He can empty the trash.
4. Are you helpful at home?[ ]
A. Yes, I can.
B. Yes, I am.
C. No, I can't.
5. Where is the desk?[ ]
A. It's behind the chair.
B. It's near the shelf.
C. It's under the bed.
存储器由内存和外存组成,内存由( )编址的块组成。
A.顺序
B.间接
C.同步
D.自由