十字花科雌蕊具2心皮,且因假隔膜的存在而为二室,所以其胎座为()。
A.中轴胎座
D.侧膜胎座
C.边缘胎座
D.特立中央眙座
参考答案:B
As a child , Jack studied in a village school ,_____ is named after his grandfather.
A.which
B.where
C.what
D.that
在下列现象中,利用做功改变内能的是[ ]
A.晒太阳感到暖和
B.用蒸笼蒸冷馒头
C.感冒发烧,用冷毛巾敷额头
D.插上电的电炉,炉丝烫了