测煤灰熔融性时,当温度达900℃后,升温速度应为()℃/min。
A.7±1;
B.5±1;
C.10±1;
D.15~20。
参考答案:B
Look at the pride on Tom's face. He _____ to have been praised by the manager just now. [ ]
A. seemed
B. seems
C. had seemed
D. is seeming
洋地黄中毒最常见的心电图表现是ST-T呈鱼钩样改变。