海冰的盐度是什么？

阅读下面短文，根据短文内容完成下列句子。

                                        Different school year in US and Cluna

    With the beginning of the new semester, we have to say goodbye to the summer holiday.  But do you

 know students in America start their semester earlier than we do?

    Most American schools have a total of about 180 days of teaching.  The fall semester goes from early

 September to mid-December, and the spring semester goes from early January to mid-June.

     In China, we have two semesters and each has about 20 weeks.  The US school year is about 20 days

  shorter than it is in China.

    In the US, school kids have a long summer vacation and a few breaks,  which are like China's Golden

 weeks. One is around Christmas, lasting about two weeks. Another is in February, for only one week. It

 can also be called "ski week", because some students go skiing during the break. And there is a

 one-week-long spring break.  It is in March or April, around Faster.

     Throughout the vear, there are also a few other holidays when students don't go to school, such as

 Thanksgiving Day.  This is similar to Mid-Autumn Festival in China.

     Now we can understand why American students start, school earlier than us at this time of year.

1. Spring semester in America is from _____ to _____.

2. Fall semester in American school year is from _____ to _____.

3. There are there breaks, there, One is _____ .another is one-week-long spririg break, either in _____.

4. There are a few holidays when students don't go to school, such as _____.

5. Thanksgiying Day in the USA is similar to _____ in China.

直接耦放大电路产生零点漂移的主要原因是：（）变化。

A、温度

B、湿度

C、电压

D、电流

银行受理人应对借款申请人提交的借款申请书及申请材料进行初审，经初审符合要求后，经办人应将借款申请书及申请材料交由贷前调查人进行贷前调查。( )

南亚地形的分布由北向南依次为：[ ]

A．山地、高原、平原

B．高原、平原、盆地

C．山地、平原、高原

D．山地、盆地、高原

职业道德原则和规范是在职业活动中根据职业义务和职业纪律要求总结概括而成的，是职业道德的（）

A.职业性

B.从属性

C.实践性

D.多样性