The speaker suggests ostrich farms are profitable because____

患者，女， 49 岁，经乱无期，时崩时漏，现月经二十余日不止，量多，色淡质稀，神疲气短，面浮肢肿，四肢不温，纳呆便溏，舌淡胖，脉细弱，最佳选方为

关于神经组织的叙述，错误的是

With the rapid development of petroleum industry, more and more oil products of high quality are being turned out.

船舶保安演习和演练应()进行一次。①至少每月；②当船员25%被换成在前三个月内未参加该船演习的，应在开航后24h进行；③至少三个月；④当船员25%被换成在前三个月内未参加该船演习的，应在船员变动后一周内进行；⑤当船员25%被换成在前一个月内未参加该船演习的，应在船员变动后一周内进行；⑥如情况特殊应至少每18个月。

Shona needs to do further research in order to____.

SOLAS公约第XI-2/5条要求连续概要记录由主管机关签发给船舶，不应包括以下信息()。

以下哪种情况不能视作为船舶的保安薄弱环节？

The teacher, rather than the students, is responsible for this matter.

As early as in the development of agriculture,men discovered how to make alcoholic drinks from grapes and corn.