【单选题】润滑剂的作用有润滑作用、冷却作用、防锈作用和()
【判断题】When the speaker was young, she did not like to talk. And her parents tried their best to help her.
【简答题】有一份电文使用5个字符:a、b、c、d、e,它们的出现频率依次为4,7,5,2,9,试画出对应的Huffman树(请按左子树根结点的权小于等于右子树根结点的权的次序构造),并求出每个字符的Huffman编码。
【单选题】润滑剂的作用有润滑作用、冷却作用()密封作用等。
【简答题】润滑油的基本作用是:润滑作用。润滑油的润滑作用与润滑油的()和()有密切关系。
【多选题】测定混凝土抗拉强度的试验方法没有统一,现在常用的有()。
【多选题】有一份电文中共使用5个字符:a、b、c、d、e,他们在电文中出现的频率依次是3、7、5、2、8,现在要构造这些字符的最佳前缀码,问下列哪些方案是可行的?( )。
A.
a、b、c、d、e的前缀码:001、10、01、000、11
B.
a、b、c、d、e的前缀码:000、10、01、001、11
C.
a、b、c、d、e的前缀码:011、10、00、010、11
D.
a、b、c、d、e的前缀码:010、10、00、011、11
【单选题】How did the author react to Jennie's relationship with her boy friend?
A.
She tried her best to dissuade Jennie from continuing it.
B.
She threatened to break up with Jennie if her advice was ignored.
C.
She was overcome with pride that Jennie told her about her boy friend.
D.
She was very angry with Jennie for choosing such a friend.