首次产前检查，下列哪个时间最合适（）。

A.妊娠6周

B.妊娠12周

C.妊娠14周

D.妊娠20周

E.确诊早孕时

Have you ever heard of “3G”? Third-generation(代) mobile phone, known as 3G are popular recently. Users can surf the Internet and enjoy videos on their phones. Firstly, for some forgetful people, they will get into trouble if they forget some important things. Now you don’t need to (__小题1:____) it any more. A 3G phone can receive video news programs and messages. Secondly, you are never afraid of losing your way home. 3G phones offer map services so that they can (__小题2:____) just by pressing(按) a few keys on your phone. The most important part of the 3G technology is video calling. You can (_小题3:____) your friends and family face to face on your phone.

It’s believed to bring people convenience in their daily lives.