医疗水准较高的医疗机构在医疗广告中可以宣传治愈率、有效率等诊疗效果。
参考答案:错
The boy often forgets his homework. So his teacher is angry
A.does
B.to do
C.doing
D.did
细胞中质粒可自行消失,也可自发产生。