【简答题】听力原文:How much did the farmer pay for his visit? How much did the farmer pay for his visit? He paid ______
【单选题】设有以下程序 #include Void main() { Int x=0,s=1; While(!x!=0) S+=++x; Printf(“%d”,s); } 则:( )
【单选题】How much did the man pay for the book? 查看材料
【简答题】How much did the new standard weight cost?
【单选题】How much did the necklace cost the woman
【简答题】设有以下程序#include Void main(){Int x=0,s=1;While(!x!=0) S+=++x;Printf(“%d”,s);}则:( )A. 运行程序段后输出1 B. 运行程序段后输出2 C. 程序段中的控制表达式是非法的 D. 程序段执行无限次
【简答题】How much did the customer agree to pay for the rent per day?
【单选题】How much did the lab cost?
A.
She thinks Mr Jenkins knows the cost better.
B.
She refuses to give the figure.
C.
She doesn't think it cost much.
D.
She thinks it's a secret.
【简答题】(6分)双氧水是一种无色液体,在二氧化锰的催化作用下能迅速分解出氧气和水。分液漏斗可以通过调节活塞控制液体的滴加速度。实验室常用这种方法制取氧气。回答下列制取氧气的问题: (1)分液漏斗应放入的物质是 。 (2)写出该方法制取氧气的文字表达式或符号表达式: 要收集一瓶纯净的氧气,应选择装置 (填字母)。 (3)若实验时用此法代替高锰酸钾加热制取氧气,则优点是:(填编号) 。 ①生成物只有氧气 ②...