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【简答题】
Several years ago I studied in a university in the biggest city in our country. It’s beautiful but it’s hot in ____1_____. So I usually returned to my hometown when my __2______ began. It is not big, but it’s cool and quiet. I could ___3______ in the daytime and have a good sleep at night. One day I had some ___4_____ to solve. But I didn’t take the dictionaries home. My father told me Charlie, one of my ____5_____, had a good library. I went to his house at once. We didn’t see each other after I __6____ middle school. At first he didn’t recognize me. He ___7_____ me up and down. And then he called out, “Oh, dear! It’s you, Fred!” Of course we were ___8_____ to meet each other again and talked a lot about our schoolmates and ___9_____. Later on he showed me around his library. It wasn’t big but there were a lot of nice books in it. And the dictionaries I __10_____ were in them too. At last I said, “__11______ you lend some dictionaries to me, please?” “I’m sorry I don’t lend any books to __12____ ,” said the young man. “Are you afraid I’ll __13______ them?” “No, I’m not. I’m afraid you won’t __14_____ them to me. Look! All the books are not __15_____ , but borrowed!” 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
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【简答题】磨削的工艺特点是____________、_______________、____________、____________
【多选题】在集中式空调系统中,单风管集中式系统的特点是()。
A.
设备简单,初投资较省
B.
设备集中设置,易于管理
C.
风管断面尺寸较小,对使用者无干扰
D.
各房间负荷变化不致时,无法进行精确调节
【单选题】下列关于铣削曲轴工艺与车-拉削曲轴工艺特点说法错误的是( )。
A.
都可省去粗磨工序
B.
加工质量好
C.
生产效率高
D.
都是与工件的高速旋转作为主运动
【判断题】临床微生物工作者应注意个人防护,检验时必须穿工作服,戴口罩和帽子,应戴乳胶手套;离去时更衣、洗手
A.
正确
B.
错误
【单选题】在集中式空调系统中,单风道集中式系统与双风道空调系统相比,其不足之处为( )。
A.
各房间负荷变化不一致时,无法精确调节
B.
风道断面尺寸大
C.
占用空间大
D.
初期投资费用高
【单选题】在集中式空调系统中,单风道集中式系统与双风道空调系统相比,其不足之处是()。
A.
各房间负荷变化不一致时,无法精确调节
B.
风道断面尺寸大
C.
占用空间大
D.
初期投资费用高
【单选题】以下不属于磨削工艺特点的是
A.
精度高、表面粗糙度小
B.
砂轮具有自锐作用
C.
背向磨削力小
D.
磨削温度高
【单选题】来自同一光源的两束光波相遇时,在屏幕上形成明暗相间条纹的现象属光的
A.
反射
B.
折射
C.
衍射
D.
干涉
E.
多普勒效应
【单选题】比较外圆车削与外圆磨削的工艺特点,以下说法不正确的是()。
A.
车削加工的工艺复杂,加工成本比磨削高;因此工件“能磨不车”
B.
磨削加工的生产效率低,但精度高于车削加工,因此高精度的零件采用“先车后磨”
C.
车削加工适合于有色金属的精加工;可达到很高的精度
D.
磨削加工可以加工高硬度的工件,但不适宜加工硬度很低的工件
【多选题】在集中式空调系统中,单风管集中式系统的特点是( )。
A.
设备简单,初投资较省
B.
设备集中设置,易于管理
C.
风管断面尺寸较小,对使用者无干扰
D.
各房间负荷变化不一致时,无法进行精确训节
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