对于估算既没有特效的办法也没有很通用的模型，项目经理不能根据以前的项目经验和验证过的指南来提高精度。
参考答案：错
根据汉语提示完成下面的句子（每空一词）。
1.—I hear you have got a pet dog. ______ ______ ______ (它长得什么样)?
—It’s small and white.
2. Please wait a minute! I have ______ ______ (重要的事情) to tell you.
3. He ______ ______ ______ (对......感到惊奇) seeing his old friend Jack there.
4. ______ ______ ______ (……的数量) foreigners living and working in Dalian is growing fast.
5.—Let’s ______ ______ ______ (看一看) at the photos of my school.
—Wow, your school is so beautiful.
简述单台阶汽车排土场的作法？
