甲肝的主要传染源为()和()，自()至()传染性较强。

Which of the following statements about securities exchanges is FALSE（）

A. A stock with a relatively large market volume is most likely to trade in the continuous market.

B. A call market is an open-outcry market where bids are called out in a trading pit.

C. The price in continuous markets is set by either the auction process or by dealer bid-ask quotes.

试述教师专业化的条件。

Which of the following nursing diagnoses would be most appropriate when teaching the mother of a toddler

A．Activity intolerance.

B．Risk for injury.

C．Delayed growth and development.

D．Impaired mobility.

如果一种产品或劳务同时具有效用的不可分割性和受益的非排他性，但在消费上具有竞争性，则该种产品或劳务属于（）。

A.私人产品

B.俱乐部产品

C.纯公 * * 品

D.公共资源

FTP服务器的域创建完成后，需要添加用户才能被客户端访问。用户包括匿名用户和命名用户。在用户名称文本对话框中输入（），系统会自动判定为匿名用户。

A．user

B．anonymous

C．U-anonymous

D．user1