A、evaporation is accomplished in a vacuum
B、due to the higher temperature of the incoming feed
C、due to the latent heat of evaporation principle
D、evaporation in a submerged medium produces more distillate
更多“The primary reason low pressure evaporators produce distillate more efficiently, and with less scale formation, than high pressure evaporators is （）.”相关的问题
A、Prevent the accumulation of explosive gases B、Protect the hull from leaking electrolyte C、Prevent movement of the battery in rough waters D、Protect against accidental shorting across terminals
A、for the other reason B、for the other reason than C、not for the reason D、only for the reason
A、Should the engine stop without apparent reason B、The engine should stop without apparent reason C、The engine stops without apparent reason D、The engine is stopped without apparent reason
A、The primary line module is inactive for five minutes and then becomes active. B、The primary line module is in standby mode，while the spare line module remains active. C、The primary line module becomes active immediately and the spare line module becomes inactive. D、The primary and spare line modules are active for five minutes，after which time the spare line module becomes inactive.
A、Connect the new DVD drive as the primary on the secondary bus and leave the old CD drive disconnected. B、Move the secondary hard drive next to the primary hard drive and connect to the primary bus. Connect the new DVD drive as the slave on the secondary bus. C、Move the secondary hard drive from the secondary to the primary bus and then reformat the hard drive after rebooting then reassign the drive letters in disk management prior to installing the new DVD drive on the secondary bus. D、Move the secondary hard drive to the bay and then connect it to the primary bus. Connect themini-tower and the new DVD drive as the master on the secondary bus.
A、ALTER TABLE students ADD PRIMARY KEY student_id; B、ALTER TABLE students ADD CONSTRAINT PRIMARY KEY (student _ id); C、ALTER TABLE students ADD CONSTRAINT stud _ id _pk PRIMARY KEY (student _ id); D、ALTER TABLE students MODIFY CONSTRAINT stud _ id _pk PRIMARY KEY (student _ id);
A、ALTER TABLE students ADD PRIMARY KEY _ id; B、ALTER TABLE students ADD CONSTRAINT PRIMARY KEY (student_id); C、ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY student_id; D、ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY (student_id); E、ALTER TABLE students MODIFY CONSTRAINT stud_id_pk PRIMARY KEY (student_id);
A、ALTER TABLE students ADD PRIMARY KEY _ id; B、ALTER TABLE students ADD CONSTRAINT PRIMARY KEY (student_id); C、ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY student_id; D、ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY (student_id); E、ALTER TABLE students MODIFY CONSTRAINT stud_id_pk PRIMARY KEY (student_id);
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