【单选题】听力原文: OK, everybody. Be quiet, please! Can we begin the meeting now? I am Mike Johnson, the chairman of the Graduation Committee for this year. I am honored to declare that all of you have been chosen...
A.
To determine who will graduate this year.
B.
To discuss the seating arrangement.
C.
To begin planning the graduation ceremony.
【单选题】若有以下程序段,则执行以下语句后 x,y 的值是分别是( ) int x=1,y=2; x=x^y; y=y^x; x=x^y;
【简答题】Fifty countries d nearly $80 million to the project.
【简答题】设 ,其中 围成,则下列正确的有 ( ).A. B. C. D. . E.
【单选题】若有以下程序段,则执行以下语句后 x,y 的值是分别是( )。 int x=1,y=2; x=x^y; y=y^x; x=x^y;
【判断题】浓硫酸溅到皮肤后,应立即用大量冷水冲洗,再用小苏打清洗,再用大量清水冲洗。
【单选题】从实验安全角度考虑,下列操作错误的是 [ ]
A.
不慎将酸溅到眼中,应立即用水冲洗,边洗边眨眼睛
B.
不慎将浓碱溶液沾到皮肤上,要立即用大量水冲洗
D.
配制浓硫酸和乙醇混合液时,先将浓硫注入烧杯中,然后边加无水酒精边用玻璃棒搅拌至冷却
【单选题】The ceremony was ____ live by satellite to over fifty countries.