电阻两端的电压加高到一定值时,电阻会发生击穿,这个电压叫极限电压。()
参考答案:错
—Look! Miss Mu is on the other side of the street.
—It _____ be her. She's gone to Tibet.[ ]
A. mustn't
B. shouldn't
C. won't
D. can't
患者75克葡萄糖OGTT结果:空腹血糖6.7mmo1/1,餐后2小时血糖为12.6mmo1/1。提示患者为()
A.糖尿病
B.糖耐量降低
C.空腹血糖受损
D.糖耐量正常
E.尚不能确定诊断