牙型代号()表示螺纹的牙型为三角形。 A.M B.Tr C.S D.T

题型:单项选择题

问题:

牙型代号()表示螺纹的牙型为三角形。

A.M

B.Tr

C.S

D.T

考点:机械员机械员专业基础知识机械员专业基础知识题库
题型:单项选择题

Mike found a job in a bookstore after he finished middle school. He wouldn’t do anything but wanted to get rich.

It was a cold morning. It snowed and there was thin ice on the streets. Few people went to buy books and the young man had nothing to do. He hated to read, so he watched the traffic. Suddenly he saw a bag fall off a truck and it landed by the other side of the street.

“It is full of expensive things.” Mike said to himself. “I have to get it right now, or others will take it away.”

He went out of the bookstore and ran across the street. A driver saw him and began to whistle (鸣笛), but he didn’t hear it and went on running. The man drove to the side, hit a big tree and hurt himself in the accident. Two weeks later, Mike was taken to the court (法庭). A judge asked if he heard the whistle when he was running across the street. He said that something was wrong with his ears and he could hear nothing.

“But you heard me this time,” said the judge.

“Oh, I’m sorry. Now I can hear with one ear.”

“Cover (盖住) the ear with your hand and listen to me with your deaf (聋的) one. Well, can you hear me?”

“No, I can’t , sir.”

“You told a lie. There is nothing wrong with either of your ears,” the judge said.

小题1:Mike found a job as a _____________ when he left school.

A.driver

B.judge

C.policeman

D.bookseller小题2:One day he saw __________ in the street.

A.an accident

B.a thief

C.a lost bag

D.a lot of money小题3:The traffic accident happened because _____________.

A.Mike was running to the street

B.the driver was deaf and couldn’t hear anything

C.the car hit the bag in the middle of the street

D.the driver wanted to pick up the bag小题4:Which of the following statements is NOT true?

A.Mike didn’t do well in his work.

B.The judge believed Mike’s words.

C.Mike told a lie.

D.The car hit a tree beside the street.

题型:单项选择题

泡腾性颗粒剂的特点是()

A.由药物与枸橼酸制成

B.遇水产生二氧化氮气体

C.崩解快,具速溶性

D.溶散性、稳定性好

E.加水后呈混悬性液体

题型:单项选择题

选择110kV及以上导体时,需要校验的特殊条件是()

A、短路动稳定校验

B、电晕电压校验

C、选择性校验

D、准确度校验

题型:单项选择题

业病防治对用人单位的要求,下列哪项不正确()

A.应对本单位产生的职业病危害承担责任

B.应依法参加商业保险

C.用人单位应采取措施保证劳动者获得职业卫生保护

D.应优先采用有利于防治职业病和保护劳动者健康的新技术、新工艺、新材料

E.用人单位应当建立、健全职业病防治责任制

题型:单项选择题

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