下列关于消化和吸收的说法，错误的是（ ）
A：人体的消化系统是由消化道和消化腺组成的
B：水、无机盐、维生素能够直接被小肠吸收
C：所有消化液中都含有消化酶
D：小肠是消化食物和吸收营养物质的主要场所
①用酒精灯的外焰给试管加热 ②加热前试管外壁的水没擦干 ③加热时试管底部触及灯芯 ④被加热的液体超过试管容积的 13 ⑤加热时没有及时上下移动试管 ⑥没有进行预热，直接集中加热管里液体的中下部．
— Have you seen the film called The trouble with Teenagers?
—Yes, but I don't think it is worth _______.
句子配对。
①How heavy is Tom?____ A. There are 15.
②How old is he?____B. He is 15years old.
③How much is the robot?____C. He weighs 51kg.
④How many boys are there under the tree?____D. It's September 15th.
⑤When is your birthday?____E. It's ¥15.
