问题
选择题
It's five o'clock. My children ______. [ ]
A. sleep
B. sleeps
C. are sleeping
D. is sleeping
答案
答案：C
搜题请搜索小程序“爱下问搜题”
It's five o'clock. My children ______. [ ]
A. sleep
B. sleeps
C. are sleeping
D. is sleeping
答案：C
每个案例至少有5个提问，每个提问有6～12个备选答案，其中正确答案有1个或者多个。
| 患者刘某，女，25岁，A1近中切角缺损，行烤瓷熔附金属全冠修复。 |
烤瓷熔附金属全冠金属基底部分的厚度为
A．0.1～0.3mm
B．0.3～0.5mm
C．0.5～0.8mm
D．0.8～1.0mm
E．1.0～1.2mm1.2～1.5mm