消化系统的主要功能是（ ）
A．运输体内物质
B．消化食物、吸收营养
C．吸入氧气，呼出二氧化碳
D．泌尿和排尿
消化系统由消化道和消化腺两部分组成，消化道包括口腔、咽、食道、胃、小肠、大肠、肛门；消化腺有唾液腺、胃腺、肠腺、胰腺、肝脏等；食物进入消化道后，在各种消化腺分泌的消化液的作用下被分解成人体可以吸收的物质，即消化；这些物质透过消化道壁进入血液循环（即吸收）后，随血液运输到身体各处，被人体利用．因此消化系统的主要功能是消化食物和吸收营养物质．
故选：B
| 课文感知。 | ||||||||||||
| 1. Anne was crazy about everything with nature because_____. | ||||||||||||
| A. she loved nature but she couldn't see it face to face B. she did not treasure what she had then C. the moonlight and the flowers had attracted her D. she often looked at nature through the curtains | ||||||||||||
| 2. From the text we can infer that Anne _____. | ||||||||||||
| A. had a dream to publish her diary one day B. wanted to know how the universe worked C. looked on her diary as her best friend D. kept her diary to write down what had happened | ||||||||||||
| 3. In Anne's opinion,the best friend is _____. | ||||||||||||
| A. someone who would not laugh at you B. someone who can understand your thoughts C. someone who can give you any help D. someone you can tell everything to | ||||||||||||
| 4. The reason why she didn't dare open the window is that _____. | ||||||||||||
| A. she has no courage B. she is afraid of night C. she is afraid of the thunder D. she is afraid of being caught by the German Nazis | ||||||||||||
5. 阅读 Anne's Best Friend,然后完成表格
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