4个月婴儿应开始添加的辅食是（）。A．果汁B．鱼肝油C．蛋黄D．菜泥，稀粥E．馒头，饼干

A、Does your software integrate with the operating system？

B、Does your software contain the operating system？

C、Does your software integrate the operating system？

It can be inferred from the last paragraph that ______.

A．your computer will always keep safe the important information

B．computer problems are easy to deal with

C．you will have to replace your computer system sooner or later

D．you must change your system regularly

A、cover the faults in the software system

B、prove the software is right

C、test the code only

D、find as many faults as possible in the software system

【填空题】System software includes the （1） system and system （2）. Operating systems are （3） that manage the system resources and enable you to run （4） programs. System utilities are special programs that （5） the usefulness of or add capabilities to a computer. Operating system can be found on most （6）. It is a collection of program （7） that controls and manages the system’s hardware as well as （8） resources, thus enabling you to run application programs. Since the operating system serves as an （9） bridging the gap between hardware and application software, it makes your machine easier to use and ensures better performance of your （10） system as well.

Can't you keep your dog______coming into my yard？ It is always disturbing us.

A．off

B．into

C．out

D．from

______ you go on the earth, there is always gravity to keep your room from falling off.

A．When

B．Whenever

C．Since

D．Because