提出“最近发展区”理论的是（）。A．皮亚杰 B．维果茨基 C．杜威 D．福禄贝尔

函数f（x）=alnx-bsinx+3有反函数的充要条件是（　　）

A．a=0且b≠0

B．b=0且a≠0

C．a=b=0

D．a=0或b=0

任务型阅读。

    People often complain (抱怨) about buses in Shanghai. The dirty smoke from the buses pollute our city.

Buses are always full of    (1)    and it's    (2)    to get a seat. (2) 有时人们得等很长时间, but the bus doesn't

come. And some bus drivers stop the bus suddenly, so people on the bus may fall down and get hurt easily.

It is natural that not so many people like to take the bus. (3) If the bus service can be made better, there will

be fewer traffic problems. Then people will feel it convenient to go anywhere in our city.

1. 在空格处填上合适的词。

    (1).                     (2).                   

2. 将(2)处译为英文。 

3. 将(3)处译为中文 。 

4. 在文章中找出下句的同义句，并写在横线上。

    People on the bus may fall down and get hurt easily because some bus drivers stop the bus suddenly.

5. 找出文章的中心句。

二五岁初孕妇，38周妊娠，早孕反应较重，近2周来腰酸背痛，呼吸困难，胃部饱满，纳少，行走不便。查体：宫高43cm，腹围105cm，触及多个小肢体，分别在宫体的左上方和右下方听到频率不同的胎心，胎心率分别为138次/分，148次/分。

首先考虑何种诊断()

A．巨大胎儿

B．羊水过多

C．双胎妊娠

D．胎儿畸形

E．前置胎盘

甲醇主要是在（）蒸煮时，原料中果胶质分解而生产。