问题 选择题

下列有关运动系统的叙述错误的是
A.哺乳动物的运动系统由骨和肌肉组成

B.只要运动系统完好,动物就能正常运动
C.一块骨骼肌一般包括肌腱和肌腹两部分
D.关节由关节头、关节窝、关节软骨、关节囊和关节腔构成

答案

AC

题目分析:哺乳动物运动系统由骨、骨连接和骨骼肌组成.骨起到杠杆的作用;骨骼肌起到动力的作用,一块骨骼肌一般包括肌腱和肌腹两部分;骨和骨之间的连接叫骨连接.有的骨连接是不能活动的,如脑颅骨各骨之间的连接;有的稍微能活动,如椎骨前方椎体间的连接;还有一种是能活动的,即一般所说的关节,关节是骨连接的主要形式,在运动中起到支点的作用,关节的基本结构包括关节面、关节囊和关节腔.关节面又分为关节头和关节窝.在关节头和关节窝的表面都覆盖着光滑的关节软骨.关节囊里面和外面都有坚韧的韧带.完成运动要在神经系统的支配下由运动系统来完成,除此之外,还需要能量,也要用到消化系统、呼吸系统、消化系统等.可见A、C符合题意.
故选:AC

完形填空
After a long day at school, I walked home with my heavy schoolbag . By the time I got home, I was sweaty,  16 and hungry. I threw my things on the couch and grabbed something from the kitchen to  17 . I passed by the living room and wished I could watch TV , but I knew my  18   would take me the whole night. I grabbed my schoolbag and went  19 to my room, feeling defeated. I tried to understand chemistry and  20 sleepiness at the same time. I was stressed out and  21 . I wanted something to cheer me up .
Later in the evening , I  22 the sound of the front door opening. And I waited for it—the sound of my mom singing .  23 she sings off-key (跑调), it made me excited that she was here. I ran down the stairs to greet my mom. We  24 and I ran back upstairs to do homework again. I like it when my mom was happy. Her  25 flowed down to me and I got the strength to  26  the stress again.
Sometimes, I wonder how my mom can still be  27 after coming back from work. Every weekday, she wakes up  28 in the morning to go to work and spends an hour on the bus before getting downtown . At a  29 factory, she works standing for the whole day and draws patterns for clothes over and over. After work, she gets stuck in  30 for two hours on her way back home. When I  31 my school life with her work life, I should not be the one to  32 . At least I have some fun things to do at school, while one mistake at work can cost my mom her job. I  33   that my mom has a positive attitude and lives her life with a joyous heart even though there may be   34 . Seeing her happy makes me feel  35 , too.
小题1:
A.heavy B.busy C.sleepy D.unlucky
小题2:
A.keepB.eatC.give D.watch
小题3:
A.dreamB.supperC.homeworkD.experience
小题4:
A.aside B.upstairs C.outwards D.nearby
小题5:
A.put offB.fight offC.refer to D.research into
小题6:
A.boredB.shocked C.worried D.frightened
小题7:
A.made B.recorded C.imaginedD.heard
小题8:
A.UnlessB.ThoughC.If D.As
小题9:
A.agreed B.debated C.hugged D.celebrated
小题10:
A.needB.ideaC.faithD.energy
小题11:
A.faceB.change C.accept D.leave
小题12:
A.creative B.carefulC.positiveD.professional
小题13:
A.earlyB.naturally C.fastD.regularly
小题14:
A.furnitureB.tobaccoC.carD.clothing
小题15:
A.taskB.trafficC.communicationD.examination
小题16:
A.replaceB.exchangeC.connectD.compare
小题17:
A.complainB.decide C.studyD.play
小题18:
A.achieveB.noticeC.appreciate D.improve
小题19:
A.liesB.difficulties C.confusions D.accidents
小题20:
A.successful B.skillfulC.good D.important
单项选择题