湖南师范大学推荐优秀应届本科毕业生免试为硕士学位研究生的推荐时间是每年（）

The（）enables water to be blow down or emptied from the boilerIt may be used when partially or completely emptying the boiler.

The engine may lose power or slow down during running, when this occurs, the first cause possible may be hot bearings and （） of the pistons in the cylinders.

There are over 58,000 rocky objects in space, about 900 of which could fall down onto earth.

非英语类、非涉外专业的普通全日制本科学生参加全国大学生英语四级考试的成绩应在多少分以上？（）

美国大学是否承认中国的自考学位或成人教育学位？

The（）(精致货) must be handled with care.

Off hire is when a vessel breaks down，strands，or has any damage that prevents the working of cargo or delays the sailing of the vessel.Under which of the following charter parties is off hire mostlikely to be mentioned?（）.

Don’t ______ that rope, or you might fall.

大学生本科毕业写的学位论文叫学士论文，也属于学术论文。

According to the regulations for lifeboat falls，which action must be taken with the falls no later than 5-year intervals?（）

取得第二个学士学位后满（）年或在大学本科学习期间同时取得双学士学位后满（）年，可直接考核认定中级资格。