【多选题】What are the advantages of electronic delivery of bill of lading____?
A.
it reduces the cycle time for the forwarding and presentation of documents
B.
it reduces the costs related to manual document preparation
C.
it allows a buyer to take title to the goods once they have arrived at port
D.
an easy-to use online bill of lading generator will save time and provide the documents instantly
【单选题】下列蛋白质中除( )外都是红细胞膜骨架蛋白。
【单选题】铁壳开关在作控制电机启动和停止时.要求额定电流要大于或等于( )倍电动机额定电流。
【单选题】Modern marine diesel engines using mechanical fuel injection, operate on a combustion cycle which is________.
A.
a combination of constant volume and constant pressure
B.
a combination of constant temperature and constant pressure
C.
entirely constant pressure
D.
entirely constant volume
【单选题】下列过程中系统的熵减少的是:
B.
1 mol H2 由 300 K , 100 kPa 定压下加热到 800 K ;
C.
1 mol H2 在 300 K ,压力从 100 kPa 下降低到 50 kPa ;
【判断题】食物过敏是在摄入食物之后,由机体免疫机制调节所引起的不良反应。
【单选题】下列过程中系统的熵减少的是
A.
在900 O C时CaCO 3 (s)→CaO(S)+CO 2 (g)