【判断题】所谓有效成分,是指具有生物活性的单体化合物,能用分子式和结构式表示的,具有一定物理常数的物质。
【单选题】The first birds appeared during late Jurassic times. These birds are known from four very good skeletons, two incomplete skeletons, and an isolated feather, all from the Solnhofen limestone of Bavaria...
B.
four skeletons in good condition
C.
two fragmented skeletons
【判断题】孟子通五经,尤长于诗书,用民意代替了诗书中用以解释政权转移的天命,把天下之得失完全放在了民心上。
【简答题】Flying across the Atlantic for the first time was a great .
【简答题】月饼的生产合格率为 99.36%属于 数据
【判断题】离心零的安装高度超过允许安装高度时,将可能发生气缚现象。
【单选题】When was the first flying boat made?
A.
At the time of the Wright brothers.
B.
It’s still developing.
【单选题】When the government of Newtown first ordered people to kill rats, people were ______.
A.
very happy to kill many rats
B.
so lazy that they killed many rats
C.
too lazy to kill many rats
【单选题】美国学者潘迪(pondy)提出的冲突五阶段模式中,属于第一阶段的是()。