如图所示,用绝缘细线悬吊着的带正电小球在匀匀强磁场中做简谐运动,则 [ ] A.

题型:不定项选择

问题:

如图所示,用绝缘细线悬吊着的带正电小球在匀匀强磁场中做简谐运动,则 [ ]

A.当小球每次通过平衡位置时,动能相同

B.当小球每次通过平衡位置时,速度相同

C.当小球每次通过平衡位置时,丝线拉力相同

D.撤消磁场后,小球摆动周期变化

考点:带电粒子在匀强磁场中的运动
题型:不定项选择

肺为

A.先天之本

B.华盖

C.后天之本

D.仓禀之官

E.君主之官

题型:不定项选择

某男,41岁,身高1.7m,体重85kg,血压142/79mmHg,血脂LDL-C是2.8mmol/L(110mg/dl),其父亲也患有肥胖症。该男子的日常食物摄入量不高,不愿参加运动

他的血压属于()

A.2级高血压

B.理想

C.正常

D.1级高血压

E.3级高血压

题型:不定项选择

阅读理解。

                                                       Stamps for the white Olympics 

    The Winter Olympics is also called the White Olympics. At this time, many colorful stamps are published

(发行) to mark (标志) the great Games. The first stamps marking the opening came out on January 25, 1932

in the United States for the 3rd White Olympics. From then on, Publishing stamps during the White Olympics

became a rule. (规定) 

    During the 4th Winter Olympic Games a group of stamps were published in Germany in November 1936.

The five rings of the Olympics were drawn on the front of the sportswear. It was the first time that the rings

appeared on the stamps of the White Olympics.

    In the 1950s, stamps of this kind became more colorful. When the White Olympics came, the host

countries (东道国) as well as the non-host countries published stamps to mark those Games. China also

published four stamps in February 1980,when Chinese sportsmen began to take part in the White Olympics.

    Japan is the only Asian country that has ever held the White Olympics. Altogether 145 million stamps were

sold to raise (筹集) money for this sports meet.

    Different kinds of sports were drawn on these small stamps. People can enjoy the beauty of the wonderful

movements of some sportsmen.

1. The White Olympics and the Winter Olympics            . [ ]

A. are the same thing

B. are different games

C. are not held in winter

D. are held in summer

2. The world made it a rule to publish stamps to mark the great world Games            . [ ]

A. after the year 1936

B. after the 3rd White Olympics

C. before the 3rd White Olympics

D. before the year 1932

3. The Winter Olympics is held once            . [ ]

A. every two years

B. every three years

C. every four years

D. every five years

4. Which of the following is true? [ ]

A. Only the host countries can publish stamps to mark those Games

B. Only the non-host countries can publish stamps to mark those Games

C. All countries can publish stamps to mark those Games

D. Japan can't publish stamps to mark those Games

5. What may appear on the stamps of the White Olympics? [ ]

A. Basketball

B. Table tennis

C. Football

D. Skating

题型:不定项选择

电器开关、电器短路、静电等产生电火花是()火风的火源。

A、娱乐场所

B、饮食业

C、农业

D、工业

题型:不定项选择

偏航轴承润滑油脂采用().

A.ShellStaminaHDS

B.Fuchsgleitmo585k

C.昆仑牌润滑脂

D.SKFLGEP2

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