问题 选择题
如图所示,AB是一质量为m的均匀细直杆,A端靠在光滑的竖直墙壁上,B端置于水平地面上,杆身与竖直方向夹角为θ,杆与地面的摩擦系数为μ,保持平衡,则此时杆与地面的摩擦力为(  )

A.mgtgθ

B.mgsinθ

C.μmg

D.μmg

答案

答案:A

完形填空

完形填空(2)

阅读下面短文,掌握其大意,然后从11~20各题所给的A、B、C和D项中,选出最佳选项,并在答题卷上将该项涂黑。

Dance can be art, ritual, or recreation. It goes __11____________ the functional purposes of the movements used in work or athletics in order to express emotions, moods, or ideas; tell a story; __12____________ religious, political, economic, or social needs; or simply be an __13___________ that is pleasurable, exciting, or aesthetically (审美的) valuable.

Besides giving __14____________ pleasure, dancing can have psychological effects. Feelings and ideas can be expressed and communicated; __15____________ rhythms and movements can make a group feel unitied. In some societies, dancing often __16____________ trance(心醉神迷的状态)or other changed states of consciousness. These states can be __17____________ as signaling possession by spirits, or they may be sought as a means to emotional __18____________. A state of trance may enable people to perform remarkable feats of strength, endurance, or __19____________, such as dancing through hot coals. In some societies shamans (道士) dance in trance in order to heal others physically or emotionally. The modern field of dance __20 ___________ developed as a means to help people express themselves and relate to others.

11.   A. behind                     B. after                        C. beyond                     D. forward

12.   A. do                           B. have                        C. perform                   D. serve

13.   A. experience         B. emotion                   C. feeling                     D. experiment

14.   A. mental                     B. physical                   C. emotional                 D. spiritual

15.   A. hearing                    B. practicing                 C. sharing                     D. enjoying

16.   A. refers to                   B. leads to                    C. turns up                   D. makes up

17.   A. interpreted        B. interrupted        C. preferred                  D. stressed

18.   A. pressure                   B. strain                       C. recognition        D. release

19.   A. danger                     B. pleasure                   C. delight                     D. sadness

20.   A. medicine                  B. operation                  C. therapy                    D. cure

问答题 计算题