A hand held instrument used to measure distances between objects and the ship is a（）.

Which one of the following is the most commonly used layer 2 network device?（）

When a teacher intends to present or explain a new language point, which of the following grouping methods is mostly recommended?

When a teacher intends to present or explain a new language point，which of the following grouping methods is mostly recommended？

Which arrangement of shell plating is used most in modern shipbuilding（）.

A pyrometer is an instrument used to measure the temperature of the diesel engine（）

When monitoring diesel engine performance, the most useful instrument to use is the （）

Which WLAN device is often used to make wireless connections between buildings or campuses?（）

Which WLAN device is often used to make wireless connections between buildings or campuses?（）

（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

The most widely used LAN system is ______ which adopts a form. of access known as CSMA-CD．

下列有关港口国检查的提法中，（）正确。 ①PSC官员是经海事组织正式授权的执行港口国监督检查的官员； ②“检查”是PSC官员观察船舶的维护状况，产生概括性的认识并登轮检查船舶证书和文件； ③“明显理由”是船舶及其设备或其船员实质上不符合有关公约要求的证据； ④“详细检查”是当PSC官员发现有明显理由表明船舶条件、设备或船员实质上与证书不符后进行的全面检查。