The officer allowed ______.

A． the students to fly the plane all the time

B． all students to fly the plane

C． the students who were not frightened to fly on their own

D． some students to fly a little while

[单选题]customs officerA．港(务)长B．海关官员C．检疫官员D．理货员

[主观题]quarantine officerA．检疫官员B．海关官员C．卫生官员D．港务局长

[单选题]_______________[A] allowed [B] preached [C] granted [D] funded

[单选题]The officer in charge of the engineering watch shall notify the chief engineer without delay ____.A．in any emergency or if in any doubt as to what decision or measures to takeB．in the event of any impending action in machinery spaces that may cause r

[单选题]The officer in charge of the engineering watch shall ensure that all machinery involved with the maneuvering of the ship can immediately be placed in the __ of operation when notified that the ship is in congested waters.A．manual modeB．automatic mode

[单选题]To accommodate the longest path allowed by 802．3，the slot time has been set to 512 bitt times，or (75) ．(75) A．521μsB．5．12μsC．0．512μsD．512μs

[单选题]To accommodate the longest path allowed by 802.3,the slot time has been set to 512 bit times,orA．0.512μsB．5.12μsC．51.2μsD．512μs

[单选题]H．ooks ________ allowed for discharging the rice bagsA．areB．are notC．is notD．is

[单选题]5． Passengers are not allowed ．A． smokingB． to smokeC． smokedD． smokes

[单选题]To accommodate the longest path allowed by 802.3, the slot time has been set to 512 bit times, or(75).A．521μsB．5.12μsC．0.512μsD．512μs