人体内有八大系统，其中的运动系统是由________和________组成．

第三部分语法填空 (共2篇，20小题；每小题1. 5分，满分30分)
语法填空（一）阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空，并将答案填写在答题卷标号为46~55的相应位置上。
Cars are too expensive for many people around the world to own. Not only that, many cities are already full of traffic, and many country areas have rough roads.
So 46 do people travel those distances that are too far to walk? They use public transportation. If you ride the subway or bus 47 you live, you can appreciate some of the benefits of public transportation. With many people 48 (share) one bus or train, there is less traffic and, more 49 （importance）, less pollution.
Which of the types of mass transit 50 (describe) below are you familiar with? If a regular bus can hold dozens of people, imagine what a bus 51 (two) the size can hold! In Great Britain, there are many buses that are known as double-deckers (cars with two floors).
Buses in Haiti are often very crowded. It’s not 52 (common) for passengers to actually sit on the rooftops. Buses are sometimes called “tap-taps”, because the 53 (ride) on the roof tap（敲击）when they want to be dropped off.
Many large cities around the world take advantage of the space beneath the streets and run underground trains. People in Paris, Mexico City and Tokyo may use the subway system to get to school, to work, or to visit friends in other 54 (neighbor). Both the Japanese and French have developed High-speed trains to link various cities. While electric trains in North America average 130 kph, the French TGV ( high-speed-train ) is the world’s fastest, 55 (average) over 270 kph!46. how 47. where 48. sharing 49. importantly 50. described

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肌肉 骨骼解析分析：此题考查的是脊椎动物运动系统的组成，脊椎动物的运动系统由骨、骨连接和骨骼肌组成．解答：人的运动系统由骨骼和骨骼肌肉组成，骨骼是由多块骨连接而成．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，如上肢的肩关节、肘关节，下肢的髋关节、膝关节等．关节是骨连接的主要形式．骨骼肌两端较细呈乳白色的部分是肌腱（属?于结缔组织），分别附着在相邻的两块骨上，中间较粗的部分是肌腹，主要由肌肉组织构成，外面包有结缔组织膜，里面有许多血管和神经．能够收缩和舒张．故