1.  Manned and\

2.  Different kinds of spaceships and rockets are designed by mechanical, electrical, and computer engineers.

3.  Named and unnamed exploratory probes are designed by physicist, electrical and computer engineers.

4.  Manned and unmanned exploratory probes are designed by mechanical, electrical, and computer engineers.

5.  Manned and unmanned exploratory probes are designed by mechanical, electrical, and computer engineers.

6.  Manned and unmanned exploratory probes are designed by mechanical, electrical, and computer engineers.

7.  Manned and unmanned exploratory probes are designed by mechanical, electrical, and computer engineers.

8.  Manned and unmanned exploratory probes are designed by mechanical, electrical, and computer, managers, and politicians.

9.  Renren, also called xiaonei, is designed mainly for college students.

10.  Two main questions were designed for my survey.