【单选题】下面关于画笔工具的描述哪个是正确的 ( )
【单选题】Why did he throw the apple away7
A.
He didn't like apples.
C.
He thought the rich man would give him much better food.
【单选题】It can be inferred from the passage that______.
A.
man hasn't completely made use of the riches of the sea
B.
technology for exploring the sea bas been found
C.
harvesting rice in the sea will be made possible
D.
in the near future man can live on the ocean floor
【单选题】使用气相色谱仪热导池检测器时,有几个步骤,下面()次序是正确的。 (1)打开桥电流开关,(2)打开记录仪开关(3)通载气,(4)升柱温及检测器温度,(5)启动色谱仪电源开关。
【单选题】She know a lot of young man, but it is not easy to choose a/an____one who is both rich and attractive.
【判断题】逻辑模型是数据库设计人员与用户之间进行交流的工具。( )