离心泵比转数大的叶轮相对比转数小的叶轮允许切割比例()。A.较大 B.较小 C.相同

题型:单项选择题

问题:

离心泵比转数大的叶轮相对比转数小的叶轮允许切割比例()。

A.较大

B.较小

C.相同

D.不按比转数而按外径决定

考点:海船船员考试离心泵离心泵题库
题型:单项选择题

军团菌是指()

A.革兰阳性球菌

B.革兰阴性球菌

C.革兰阳性杆菌

D.革兰阴性杆菌

E.抗酸阳性杆菌

题型:单项选择题

When I worked as a waitress in Chicago, US, my coworkers and I would sigh whenever we heard someone with a foreign accent coming into our restaurant. We knew what it meant to serve a non-American: no tip. We would work just as hard as we always did, but we might not get paid.

Americans have an unspoken rule about tipping: they give tips to almost everyone who offers them a service of some kind. Americans tip their waiters, barbers and taxi drivers. An appropriate tip is between 15 and 20 percent of the amount charged for the service (But the charge for the tip doesn’t appear on the bill. The customer is expected to add it himself/herself.) Tipping less than this sends a message to your waiters that you think they’ve done a bad job serving you. And to leave no tip at all is simply unacceptable.

It’s not that American waiters are greedy. In many countries, waiters are paid a salary for their work. They’ll earn money even if no one comes into the restaurant. This system offers much more safety for waiters than the American version. In the US, waiters know that a night without customers means a night without pay.

Some countries include a tip for waiters – a “service charge” – on the bill itself. Since the tip is included with the other charges, waiters don’t need to worry about people forgetting to tip. But in the US, waiters do not receive a salary, and service charges only appear on bills when there are six or more customers at the table.

Since almost all American customers are familiar with the system, they know to add a tip without being told. But visitors to the US may expect waiters to be paid a salary, or think that the tip is included on the bill.

So much as we waiters loved hearing stories about other places from our foreign customers, we were always nervous when they got ready to leave the restaurant. We were never sure what to expect.

小题1:If you order $200 worth of food, which of the following is a proper total payment?

A.$200

B.$215

C.$220

D.$230小题2:Why don’t some foreigners tip a waiter according to the writer?.

A.because they are unfamiliar with the American tip system .

B.because they are too mean to give tips to any waiter.

C.because they have difficulty communicating with waiters.

D.because they are not really easy to become satisfied.小题3:What can we learn from the passage?

A. The service charge never appear on the bill in the USA.

B. Customers are usually expected to tip waiters in the USA.

C. Dining out in other countries is much more expensive than in the USA.

D. Waiters in other countries earn much more money than those in the USA.

小题4:What is the main purpose of the passage?

A.To complain about the difficult life of American waiters.

B.To warn other waiters not to serve any foreign customer.

C.To call on foreign customers to leave tips for American waiters.

D.To tell us something about American waiters’ salary system.

题型:单项选择题

采用湿制颗粒制备中药片剂,压片前的颗粒含水量一般为()

A.1%~3%

B.3%~5%

C.5%~7%

D.8%~9%

E.10%~13%

题型:单项选择题

组织应识别过程控制手段,形成文件化的清单,包括过程控制和经批准的()。

A、检验和测量装置

B、试验装置

C、备用或替代方法

D、防错装置

题型:单项选择题

《浙江省职工基本养老保险条例》规定县级以上()等部门应当按照各自职责,共同做好职工基本养老保险工作。

A.审计

B.监察

C.工商

D.人大

更多题库