爆炸信号与时钟第一计时线大于2ms,这样的记录应评为()。
A.一级品
B.二级品
C.废品
D.无法确定
参考答案:C
This is a big factory and there are _____ workers in it. [ ]
A. three thousand
B. three thousands of
C. three thousands
心绞痛()急性心肌梗死()肥厚型心肌病()病毒性心肌炎()
A.胸骨后压榨性疼痛
B.心电图示病理性Q波
C.两者均有
D.两者均无