直翅目昆虫主要有（）。A.蝗虫 B.蟋蟀 C.蝼蛄 D.螽蟖

下列关于时间和时刻的说法中，正确的是（　　）

A．一节课45分钟，是指时刻

B．从教室到宿舍走了5分钟，是指时间

C．第4秒末，是指时间

D．我们要珍惜每一分钟，是指时刻

有红、黄、蓝、黑四种小球各若干个，每个人可以从中任意摸出两个．那么，需要多少人同时摸球，才能保证至少有2人摸的小球颜色相同？

Waller was a liked－by－all fellow full of fun who often went to coffee houses to tell people interesting stories, of which some even brought him some money. One day, asked by an office secretary who told Waller that his boss was a never－seen before serious man and he never even smiled. Waller would tell a most funny story. “Well, sir,” Waller said before he began the story, “What will be given in return of my success?”“＄100,”replied the secretary. “I haven’t seen him have a bright face since I worked in his office.”

“Then let’s make it.” Waller went to the man’s table and whispered to him, “Please tell your boss that the funny man Waller’s hen gave birth to a baby.”

Three days later a letter reached Mr. Waller in which were ＄100 and a piece of yellow paper with the words, “Mr. Waller, you have succeeded—When I repeated your ＄100－worth sentence, my boss burst into frightening laughter, saying that whoever has managed to make him laugh during the business hours will get dismissed!”

小题1:The secretary asked Waller for a most funny story because he ______.

A．was tired of his boss seriousness

B．tried to please his serious boss with it

C．wanted to improve his working conditions

D．wanted to see his boss' laughing face小题2:Saying "Let's make it," Waller______．

A．was sure of his success

B．thought of nothing but the 100-dollar return

C．knew that his hen had really given a birth to a baby

D．wondered whether he could make the boss smile or not小题3:Which of the following ends is true according to the passage?

A．The boss was never so strict with the secretary from then on．

B．The secretary lost his job in office．

C．The secretary dare not make his boss laugh any longer．

D．Mr．Waller was dismissed at last．小题4:Which sentence can describe the theme of the story?

A．Things Went Opposite to Wishes

B．Satisfying Both Sides

C．Killing Two Birds with One Stone

D．Either Is in His Proper Place

FZh－CTC分散自律调度集中系统用于（）站时自律机从联锁控显机获得信息。

毒害品的挥发速度越快，越容易引起中毒。（）