…李教授在考察日记中写道：“今天，天昏地暗，吹着强劲的东风，气温在－40℃。这时，在我的家乡珠江三角洲，早稻正在收割。”此时，李教授家乡的天气现象可能是（） 霜降冻害。 寒风刺骨。 低温阴雨。 狂风暴雨。
The responsibilities of the engineer officer in charge of the watch do not include （） to ensure the main propulsion plant are kept under constant surveillance。 to ensure the auxiliary systems are kept under constant surveillance。 to inspect the steering gear spaces at suitable intervals。 to inspect and overhaul the equipments in his charge。
…李教授在考察日记中写道：“今天，天昏地暗，吹着强劲的东风，气温在－40℃。这时，在我的家乡珠江三角洲，早稻正在收割。”日记中记述的这天，李教授可能在（） 撒哈拉沙漠。 喜马拉雅山。 北极地区。 南极地区。
Which of the followings is not an indication of a bad maintenance?（） a pipe with welded connections。 a pipe with several clips。 a cement box。 a leaking valve。
In deciding to detain a ship or not, the PSCO would better not（） make his decision independently。 request the owner’s representative to provide proposals。 cooperate with the flag State Administration’s representatives。 consult the organization responsible for issuing the relevant certificate。
When the chief engineer is in the machinery spaces, the officer in charge of the engineering watch shall（）
