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【单选题】
听力原文：Jeremy runs into a problem. He intends to hold a conference for online gamers about 500 attendees. He has set up all the arrangements such as location and accommodations based on this number. But over 200 people have registered than expected. It will be overcrowded and he will be penalized by the online gamers association. Jeremy wanted to get in touch with them to ask for help, but nobody responded. He thinks of selecting people from the registers to take part in extra sessions, but this will not fix the problem. Now he is watching nervously as the attendees are arriving. What problem does the speaker mention?A.
Jeremy is ill and cannot preside the conference.
B.
The conference will be forced to cancel due to the bad weather.
C.
Attendees has over-registered for a meeting.
D.
Jeremy cannot get in touch with the online gamer association.
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【简答题】在有彩色中,明度最高的是黄色,明度最低的____。
【判断题】如图所示,球1被向后拉,然后放掉,球5向前弹起。如果球1和2被向后拉,然后释放,则球4和5向前弹起,等等。两边谈起来的球的数目相同,是因为发生的是完全弹性碰撞。
A.
正确
B.
错误
【单选题】出入无人控制的电梯时,陪同人员应该 : ( ) 。 A 、先进后出 B 、控制好开关钮 C 、以上都包括 D 、以上都不对 出入无人控制的电梯时,陪同人员应该( )。
A.
先进后出
B.
控制好开关钮
C.
以上都包括
D.
以上都不对