【简答题】如何获得命令帮助?man命令的作用是什么?
【单选题】与xoz面平行且与y轴垂直的平面方程是?
【单选题】Excuse me, but could you tell me _______?
B.
how I can call this young lady
C.
what is the matter with you
D.
how long the dog has died
【简答题】某化学兴趣小组利用某废弃的氧化铜锌矿制取活性ZnO实验流程如下: 请回答下列问题: (1)加入铁粉后发生反应的离子方程式为_________________________________。 (2)甲、乙两同学选用下列仪器,采用不同的方法制取氨气。 ①甲同学使用的药品是熟石灰与氯化铵,则应选用装置_______(填写装置代号),生成氨气的化学方程式为________________________...
【单选题】What is your excuse ______ your being late yesterday?
【单选题】What is your excuse_____being absent?
【单选题】What is not the acceptable excuse for your absence from school?
A.
Wedding ceremony of a relative.
B.
A death in the family.