对于精密轴承部件装配，可用（）进行轴承预紧的测量。 A.凭感觉 B.弹簧测量装置 C

Like schools in China, American schools begin in September after a long summer vacation. The first term is from September to January and the second is from February to June. Usually American children begin to go to school when they are five years old. Most students are seventeen or eighteen years old when they finish high school.

But unlike middle school students in China, high school students in America take only four or five subjects each term. They usually go to the same classes every day and have homework for every class. After class they do all kinds of interesting things.

After high school, many students go to college. They may go to a small or a large one. They usually have to pay a lot for their higher education. So lots of students work after school to make money for their studies.

小题1:In America, summer vacation lasts（持续）___________________.

A．one month

B．two months

C．three months

D．more than three months小题2:The underlined（下划线的）word “college” means _________________ in Chinese.

A．大学

B．公司

C．研究院

D．高中小题3:Many American students work after class, because they ___________________.

A．want to see interesting things

B．have to help the other people

C．want to make more friends

D．have to get money for their studies

某公司是一家由事业单位转制而成的股份制企业。在转制之前，员工的薪酬基本上是按照职务、技术职称和工龄等来确定的，员工的工资差别不大，所以干多和干少一个样，尽管单位的效率不高，但大家觉得挺满足。改制以后，由于企业要直接面对激烈的市场竞争，公司的领导层决定打破传统的薪酬体制，实行绩效薪金制。两年过去了，该公司的产值翻了两番，员工的收入也大大增加，大家觉得比以前更满足了。根据以上资料，回答下列问题：

该公司实行绩效薪金制时，可以选择的绩效包括（）。

A.个人绩效

B.部门绩效

C.责任绩效

D.组织绩效

淀粉拌入肉片中，再放到热油锅里爆炒，炒出的肉片既鲜嫩味美又营养丰富，对此现象说法不正确的是

A．在炒肉片过程中，肉片的温度升高，内能增加

B．附着在肉片外的淀粉糊有效防止了肉片里水分的蒸发

C．在炒肉片过程中，肉片内能增加主要通过做功实现的

D．附近能闻到肉香体现了分子在不停地做无规则的运动

我国乙型肝炎的最主要的传播途径是（）

A.输血或血液制品

B.接触传染

C.性传播

D.母婴传播

E.消化道传播