业务计划包括（）等。A.生产计划 B.销售计划 C.研发计划 D.人事计划 E.财务

根据括号中的要求改写下列句子。

1. He is going to Shanghai. (用现在完成时) 

   ______________________________________

2. I heard about the news about the space travel. (改为同义句) 

    ______________________________________

3. Scientists have found life on other planets.(改为否定句) 

    ______________________________________

4. They haven't been to Mars. (用yet) 

       ______________________________________

5. The spacecraft has reached the moon. (用just)

    ______________________________________ 

6. Many astronauts have visited the space station. (用already) 

    ______________________________________

对有机物右图所示分子的叙述不正确的是

A．能发生碱性条件的水解，1mol该有机物完

全反应消耗7molNaOH

B．常温下，可与Na₂CO₃浓溶液反应

C．与稀H₂SO₄共热，生成两种有机物

D．该有机物的分子式为C₁₄H₁₀O₉

When Tom was very young, he was terribly frightened of snakes, but he soon ______ it.

A．got over

B．got across

C．got through

D．got off

社会分层的基本类型是( )。

A．阶级分层和非阶级分层

B．职业分层和职务分层

C．经济分层和政治分层

D．权力分层和声望分层