设直线的方程为，则直线（）。 A．过点(1,-1,0)，方向向量为2i+j-k B．
题型：单项选择题
问题：
设直线的方程为
，则直线（）。
A．过点(1,-1,0)，方向向量为2i+j-k
B．过点(1,-1,0)，方向向量为2i-j+k
C．过点(-1,1,0)，方向向量为-2i-j+k
D．过点(-1,1,0)，方向向量为2i+j-k
题型：单项选择题
| 完成句子，使改写后的句子完整，并与原句意思相符，注意每空只填一个单词。 |
| 1. What is his family name? What is his ____ name? 2. We should eat much healt  hy food every day.We should eat ____ ____ healthy food every day. 3. Her notebook is under the backpack. The backpack is ____ ____ notebook. 4. My father exercises every morning. My father ____ ____ every morning. 5. Xiao Li can't use the computer and he says it is difficult. ____is difficult____ Xiao Li to use the computer. |
