【单选题】Which one of the four figures was the designer of the two mansions?
B.
Alexander Jackson Davis.
【单选题】Which was NOT done during Qianlong’s reign?
A.
Set up a publishing house to compile history books.
B.
Defended his empire from invasions and encouraged land open-up.
C.
Organized many calligraphy competitions.
【多选题】The professor mentions two great figures in the field of biology. What are their common attributes in the professors viewpoint? [Clink on 2 answers. ]
A.
They always used the same well-known and trusted techniques.
B.
They received wide public attention after their major contributions to biology.
C.
They were both unknown during early stages of their careers and later gained widespread recognition.
D.
Their theories and contributions stimulated the field of biology to a great extent.
【判断题】大部分的柴油机都是点燃式发动机,大部分的汽油机都是压燃式发动机。区分发动机是点燃式还是压燃式要看引起燃烧的点火方式。
【判断题】(2分) 汽油机是点燃式的发动机,通常是由进气、压缩、做功和排气四个冲程, 所以发动机必须是四个汽缸
【判断题】汽油机是点燃式的发动机,通常是由进气、压缩、做功和排气四个冲程,所以发动机必须是四个汽缸。
【判断题】汽油机是点燃式的发动机,通常是由进气、压缩、做功和排气四个冲程,所以发动机必须是四个汽缸。
【单选题】The Roman Empire did not allow tree cutting in Europe during its reign.