钢轨头部外侧()范围内,道口铺面应低于轨面5mm。
A.20mm
B.30mm
C.50mm
D.100mm
参考答案:C
根据句意及首字母提示补全单词。
1. I have to look up the new words, I’m in great need of a d____ .
2. The e can take you to the second floor. You needn’t walk.
3. When you’re in a foreign country the first thing is to e money.
4. After school some teenagers p____ to stay out late.
5. --------Do you like h out at the mall?
--------No, it’s crowded.
远视眼看不清近处的物体,可以配戴凹透镜加以矫正.______.