It’s the first time I __ to see you this year.
A.had come
B.came
C.have come
D.come
答案:C
某5.0万千瓦机组,转速3000r/min,速度变动率为5%,问当负荷突然由5.0万千瓦甩至2.0万千瓦时转速按静态特性应升高多少?
随机血糖的参考值范围为()
A.2.8~7.8mmol/L
B.3.89~6.11mmol/L
C.4.5~5.9mmol/L
D.7.0~11.1mmol/L
E.<11.1mmol/L