耐热钢分哪几类?
参考答案:
按组织分有珠光体耐热钢,马氏体耐热钢,铁素体耐热钢和奥氏体耐热钢。
耐热钢分哪几类?
参考答案:
按组织分有珠光体耐热钢,马氏体耐热钢,铁素体耐热钢和奥氏体耐热钢。
阅读理解。 |
An English traveler found himself in Norway with only enough money to buy the ticket for him to go |
1. The story happened _____. |
[ ] |
A. in England |
2. The traveler didn't go to the dinning room first because _____. |
[ ] |
A. he had no money B. he didn't feel very well C. he didn't want to eat anything D. he didn't hear the sound of the bell |
3. The traveler went to the dinning room to eat something because _____. |
[ ] |
A. his friend had given him some money B. the waiter had asked him to change his mind C. he learned that there was no bill on the ship D. he was too hungry |
4. The traveler had _____ on the ship. |
[ ] |
A. only one meal B. two meals C. three meals D. none |
5. After the traveler finished eating, _____. |
[ ] |
A. he had a quarrel with waiter over the bill B. he drank a lot C. he asked the waiter to bring him the change (零钱) D. he came to know that travelers on the ship had free meals |