Nijo castle was used as an imperial palace for a while in ___?
A. 1687
B. 1837
C. 1867
D. 1873
查看答案
Lake Ashi is famous for the view of Mount Fuji and its numerous____.
The Osaka Sea Aquarium is one of the largest outdoor aquarium in the world.
A. 对
B. 错
与单独处理相比，诱变剂的复合处理虽然不能使微生物的总突变率增大，但能使正突变率大大提高。
A. 对
B. 错
艺术起源于
A. 旧石器时代
B. 新石器时代
C. 夏代
D. 商代
微信支付 
支付宝支付