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问题 多项选择题

关于龋齿的膳食防治，叙述正确的是（）

A.钙磷比例适当

B.牛乳防龋作用优于母乳

C.蔬菜、水果对牙齿有洁净作用

D.睡觉前不应吃食糖

E.常吃精白米、白面不容易致龋

答案

参考答案：A, C, D

单项选择题

下列工作中，不属于进度控制内容的是（）。

A.进度目标的分析和论证

B.进度计划的编制

C.进度计划的跟踪检查与调整

D.按进度计划进行的费用偏差分析
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句型转换

句型转换。

1.There are many cars and buses on the street. (改为一般疑问句)

                                                                                                    

2. She is reading a book. (就画线部分提问)

                                                                                                     

3. Jenny can fly a kite. (改为否定句)

                                                                                                     

4. He hurts his nose. (改为同义句) 

                                                                                                     

5. This is easy for me. (改为同义句)

                                                                                                     

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