触电的人心脏跳动停止时,应采用()方法进行抢救。
A.口对口呼吸;
B.胸外心脏挤压;
C.打强心针;
D.联系医院。
参考答案:B
Miss Gu is _____ teacher. She teaches ____ Chinese.
A.them; them
B.their; their
C.them; their
D.their; them
摩尔定律指出,当价格不变时,集成电路上可容纳的晶体管数目,约每隔()便会增加一倍,性能也将提升一倍。
A.6个月
B.18个月
C.12个月
D.24个月