【单选题】带幼儿外出就医,要根据不同季节做好( )工作。
【单选题】I found the new flat______ in pleasant surroundings.
【简答题】直流串励马达绕组包括 和 ,它们是 的,当起动机开始转动 时,它产生最大力矩 。
【简答题】为48 输送304kpa的饱和水蒸气,外界空气温度为20°C,试求不隔热与包上30mm石棉时每米管长的热损失速率。设空气的传热膜系数为15w.m-2.k-1,水蒸气传热热阻可忽略。
【单选题】用φ48mm×3mm的钢管输送304kpa的饱和水蒸气,外届空气温度20 °C ,试求不隔热与包上30mm石棉 每米管长的热损失速率(空气的传热膜系数可设为15 )水蒸气传热的热阻可以忽略。
【单选题】Peter: Have you heard that all the international flights have been canceled because of the weather? Julia: No, I've been in the meeting-hall all day. Peter: Unfortunately, I found it out while waiting...
A.
In the flight to New York.
C.
At the international flat.
【单选题】The flats I have looked at so far were too expensive. So I’m better off staying where I am . The underlined part means _______.
A.
I will move to a new flat.
B.
I won’t move to a new flat.
C.
I am looking for a new flat.
D.
I have found a new flat.