质量为m的物体放在A地的水平面上,用竖直向上的力F拉物体,物体的加速度a与拉力F

题型:选择题

问题:

质量为m的物体放在A地的水平面上,用竖直向上的力F拉物体,物体的加速度a与拉力F的关系如图中直线①所示,用质量为的另一物体在B地做类似实验,测得a-F关系如图中直线②所示,设两地的重力加速度分别为g和 ,则(  )

A.

B.

C.

D.

考点:牛顿运动定律的应用
题型:选择题

骨显像时,为了便于分析骨转移瘤的分布特点,将全身骨骼划分为如下5个区域,下列哪项不属于胸部()。

A.肋骨

B.锁骨

C.胸椎

D.胸骨

E.肩胛骨

题型:选择题

女,28岁。1年前曾人工流产,近2月 * * 不规则流血,妇科检查:子宫稍大,尿HCG(+),胸片见右上肺有数个直径0.5cm的阴影,边缘模糊。

进一步处理下列哪项合适()

A.刮宫术

B.后穹隆穿刺术

C.腹腔镜检查

D.化学药物治疗

E.子宫全切术

题型:选择题

在关系模型中,为了实现“关系中不允许出现相同元组”的约束应使用

A.临时关键字

B.主关键字

C.外部关键字

D.索引关键字

题型:选择题

Learning new words is learning new ideas: High school students can take control of

their learning by always looking up new words and finding out what they mean. They should keep a dictionary and a thesaurus close at hand.

Make clear lists: Students should make a list of everything that they need to get done. They should check off assignments(作业)once completed. They should include clear due dates.

Make a commitment: Active learners will resolve to keep up –to-date from the start. They will avoid procrastinating. They will complete most of their work as early as possible.

Independent work is best: Students will do all assignments independently—they will never copy! Students who copy are passive learners. Passive learners do not give their mind a chance to think on its own.

Organization is key: Students should keep an excellent folder and notebook. All problems should be clearly stated and solutions given. All tests and quizzes should be corrected and used as study guides for exams and finals.

All actions without solutions are dead: Active learners will always show their work needed to solve a problem. Active learners will never turn in a list of answers without giving an explanation or a solution.

Advanced reading: Students should do any required reading for the topic before class. They should write an outline of the section or chapter. They should actively take notes as they read to help them remember.

小题1:If you want to be successful in exams and finals you should       .

A.give your mind a chance to think on its own

B.check off your papers once completed

C.keep an excellent folder and notebook

D.hand in your homework on time小题2:What does the underlined word” procrastinating” mean?

A.be active doing something

B.finishing doing something

C.delaying doing something

D.doing something ahead小题3:The best title of the passage is “        ”.

A.How to Be an Effective Reader

B.How to Get Good Scores in Tests

C.How to Collect Academic Information

D.How to Actively Study in High School

题型:选择题

在百度搜索时,可以提高查全率的语法是()

A、site

B、intitle

C、竖线

D、双引号

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