镗刀()选择的原则是:粗加工时应采用较小角度,精加工时应采用较大角度。
A.前角
B.后角
C.主偏角
D.副偏角
参考答案:B
阅读理解,选择正确的答案。
Mary is a little girl. She is only five years old. She is not at school. She doesn't know how to read or write.
But her sister Joan is a schoolgirl. She is ten. She knows how to read and write.
One day, Joan sees her little sister in the room. She is at the table. There is a pencil in her hand. She is
writing. "What are you writing, Mary?" She asks. "I'm writing to my friend, Rose." "But how can you? You
don't know how to write." Says her sister. "Well," says Mary, "It doesn't matter. Rose doesn't know how to
read, either."
1. Is Mary a schoolgirl?[ ]
A. Yes, she is.
B. No, she isn't.
C. We don't know.
2. Who can read and write?[ ]
A. Mary.
B. Rose.
C. Joan.
3. What's in Mary's hand?[ ]
A. There's a pen.
B. There's a pencil.
C. There's a crayon.
4. What's Mary doing?[ ]
A. She's drawing.
B. She's writing to her friend.
C. She's singing.
5. Can Rose read and write?[ ]
A. No, she can't.
B. Yes, she can.
男,40岁,囚车祸发生脾破裂、就诊时血压 BP 8/4kPa(60/30mmHg),脉率120次/分,病人烦躁不安,皮肤苍白,四肢湿冷。
医嘱为病人补充以下液体,能够降低血液黏滞度且疏通微循环的液体是
A.全血
B.平衡盐溶液
C.5%葡萄糖溶液
D.10%葡萄糖溶液
E.低分子右旋糖酐